Walkthrough Guide

Néro & Sci ∫ Integral Edition 

Library

Objective 1 – Talk to Psyga on the 3rd floor of the library

When you start the game, you’ll appear outside the library. Move to the right to enter. Speak with the guard at the entrance — he’ll tell you that Psyga is waiting for you on the 3rd floor. Continue to the elevator and use the + button to go up to the 3rd floor. There, you’ll meet Psyga, the director of the library. He will ask you to go clean the library’s basement.

 

Objective 2 – Clean and explore the library basement

After talking with Psyga, head down to the basement. To do so, use the elevator with the button. If you’re in a hurry to start cleaning, feel free to jump into the void — you’ll never lose a life from falling in this game! Then, clean the library areas that need it. You can spot them using the button prompt displayed on the screen when you walk by. In front of a bookshelf, you’ll knock down a purple book and release Sci. The adventure begins here!

 

M1_00 | Tutorial

In this level, you’ll discover the beginning of the game’s story. You’ve just knocked over the Book of Chaos Theories, causing the library floor to collapse. Now, you must find your way out of the caves. Along the way, you’ll learn the controls and unlock abilities for both characters. Explore the level to your right. The first ability you’ll find is Néro’s double jump. It allows you to jump higher or recover when you fall or slip. Keep exploring the level to the right.

Keep moving forward and you’ll learn how to use Sci to move objects such as blocks in order to open doors. Here, you must move the small square onto the pressure plate on the left to open the door.

Note: If you want to play in co-op mode, Player 1 controls Néro for platforming and combat, while Player 2 controls Sci, who can grab objects or block enemies (an ability unlocked later). To play this way, plug in a second controller or give the mouse to Player 2 to control Sci.

After this door, you’ll unlock Sci’s new ability: the White Dimension. This special skill allows you to see a simplified version of the world and spot hidden clues.

Keep moving forward and you’ll encounter the first puzzle of the game. In this puzzle, you’re facing four levers, each with a different shape above it. The goal is to activate the levers in the correct order.

Use the White Dimension to reveal new clues. You’ll see the code 3564, meaning you must activate the levers in that exact order to open the door. The shapes above the levers are polygons with different numbers of sides — for example, the triangle has 3, the square has 4, the pentagon has 5, and the hexagon has 6. Activate them in the order shown in the White Dimension to unlock the door.

Warning: There’s an enemy waiting behind the door. Defeat it using the attack button, just as you did when activating the levers.

In the next section, you’ll learn that Sci can also use objects to help you jump higher when the double jump isn’t enough.

Note: When Sci grabs an object, she can also use it to block an enemy and prevent it from attacking Néro. Only Néro can pass through objects held by Sci — this design choice prevents you from getting lost in the levels.

Use the large square block to move through the rest of the level until you reach the exit. The exit is marked by a door — simply jump into it to leave the level. The game automatically saves your progress each time you exit a level.

W1 - 01 - First step toward the adventure

From now on, you’ll explore the Frozen Caves levels and solve puzzles to unlock doors and complete each stage. Remember to talk to the characters you meet — they may tell you a story or ask for your help with a side quest. Collect Light Coins along the way; they can be used to upgrade Néro & Sci’s platforming abilities.

Start exploring the level and you’ll meet your first friend. After talking to them, a “Select!” icon will appear — this means you’ve unlocked the character, and they’re now available in the Compendium menu.

Note: If you unlock all friends in World 1, you’ll gain access to two bonus levels.

As you continue your journey, you’ll meet Lantern, a unique character. He doesn’t tell stories — instead, his words and quotes are intentionally cryptic, meant to make you reflect on the meaning of life.

Then, continue your path until you reach the first puzzle of the level.

Here is the first puzzle of this level, which you must solve to move forward. If you need a hint, collect apples — they allow you to ask Sci for an additional clue in case you get stuck. Sci will always give you hints to help you solve the puzzle, but never the full solution!

Here, you can see several blocks that Sci can move. One block is on a pressure plate, another is in front of an enemy, and six more are behind a door. A second enemy stands in front of a lever that unlocks the door containing the six blocks.

In the background, you can also spot representations of blocks that cannot be moved.

 

Enter the White Dimension to understand how this puzzle works. In the flipped world, you’ll notice a + sign between two shapes.

After exploring the White Dimension, you’ll see that the left side of the screen is an example: 2 + 1 = 3. In the center lies the actual puzzle: 3 + 3 = ?.

To solve the puzzle, you need to unlock the door in front of the movable squares on the platform. Go up to the top-right and activate the lever to open the door.

Then place 6 blocks on the pressure plate (3 + 3 = 6) to complete the puzzle and continue on your way.

Behind the door that just opened, you’ll find a panel with a floppy disk symbol. A small sound will play as you pass by — this means you’ve reached a checkpoint!

Checkpoints automatically save your progress — including your score, unlocked abilities, and collected Light Coins. If you quit the game and return to the level from the world map, you’ll respawn at your last checkpoint.

However, you won’t be able to go back. Previous doors will remain closed to prevent you from getting lost by backtracking.

 

After the checkpoint, continue to the right. At the top, you’ll find a small ledge with a new friend to unlock. Once you talk to them, you’ll be able to find more information about this character in your Compendium.

 

Below, you’ll find a block that will help you climb higher in the level. Grab the block with Sci and use it to reach the next puzzle.

You now find yourself in front of a new puzzle and a character to unlock.

Note: To unlock certain characters like this one, it’s not enough to simply talk to them. You must speak with them first, then either solve a puzzle beforehand or complete the side quest they assign you. Once the condition is met, a “!” symbol will appear above their head. Talk to them again to unlock the character.

In this puzzle, you’ll see a number (36) and several levers above a formula that doesn’t match the result: 6 × (2 (4)).

Activate the levers until the formula becomes 6 × (2 + 4) = 36. Once you get the correct result, the next door will open.

Once you’ve solved the previous puzzle, you’ll enter a new section. Explore the upper part of this area to find and talk to a new character. Next to them, you’ll find a Light Well — a small bush filled with Light Coins, which can be used to purchase skills in the Compendium.

Note: Light Wells can only be used once. If you want to collect more coins, you can replay a level. Only the coins dropped by enemies and those placed in the environment can be collected again.

Be careful: enemies can make you lose coins, so try to anticipate their attacks!

Then, head down to the lower part of this section to continue. There, you’ll find a yellow sign that explains how to upgrade your skills.

If you open the Skills menu, you can see how many Light Coins you currently have and click on the white nodes to purchase new abilities.

In this example, this ability costs 25 Light Coins. Click on it to buy it! You’ll be able to upgrade it later. Then, continue your journey toward the next puzzle!

/!\ Challenge during the Steam Next Fest (October 2025): There aren’t enough levels to naturally unlock all the available skills in World 1. Replay every level until you’ve unlocked as many skills as possible, and send us a video capture of your Skills MenuThe first player to unlock every skill will win a key for the full game!

As you continue, you’ll come across the third puzzle of the level, which you’ll need to solve to progress. A purple sign indicates that you’ll find clues in the White Dimension. You can also get a hint from Sci by collecting the nearby apple.
 

In this puzzle, you’ll find four blocks that Sci can move (9, 8, 4, and 3) onto pressure plates. You need to find the correct combination. One example shows two blocks (5 and 2) above the number 10. When you activate the White Dimension, you’ll see the formula 5 × 2 above the number 10, as well as a × symbol on each pressure plate. Below the left pressure plate, you’ll see the number 27, and below the right one, 32. From this, you can deduce that you need to follow the example 5 × 2 = 10. To solve the puzzle, place the blocks to create 9 × 3 = 27, then 8 × 4 = 32.

After solving the puzzle, you can finally finish the level by going through the exit door!

At the end of each level, you’ll see a summary of your performance — the number of extra coins you collected, whether you found all your friends, and the mathematical theories you unlocked, which are now available in your Compendium.

W1 - 02 - Geometry of the cavern

In this level, you’ll meet a character who asks for your help to find their four lost gemstones. This is a side quest that allows you to unlock this character. You must find all four gemstones and place them on the pressure plate to free them.

Head to the right to find the first puzzle and start searching for the first two stones.

Quest: One gemstone is located on the pressure plate, another nearby on a platform to the left of the character, a third one up to the right after solving the next puzzle, and the last one near a path descending to the left after the second puzzle of the level. Once you’ve found them all, a door will unlock, allowing you to collect Light Coins.

 

In this first puzzle, you’ll see platforms labeled 360°, 90°, and 60°, along with a square shape placed above three pressure plates. There are three blocks scattered around this area: a square, a circle, and a triangle.

The goal of this puzzle is to place each shape on the correct pressure plate. The first clue tells you to place the square on the middle plate, beneath the platform marked 90°. From this, you can deduce that 90° corresponds to the square, 60° to the isosceles triangle, and 360° to the circle.

Place each shape on the correct pressure plate to activate the moving platforms and continue your exploration. Then, take the path at the top left to reach the second puzzle.

The second puzzle of this level is a logic-based puzzle. To solve it, you’ll need to analyze the scene carefully. There’s an enemy, two shapes that Sci can take (a diamond and a right triangle), and on the pressure plate, there’s a right-angle symbol.

To open the door, simply place the right triangle on the pressure plate, since it’s the only one of the two shapes with a right angle.

To open the door, simply place the right triangle on the pressure plate, since it’s the only one of the two shapes with a right angle.

In the next section of the level, you’ll meet a new character who will give you a quest. The large wheel is stuck, and you’ll need to unblock it. To do this, use the platforms to move to the right and reach the next puzzle.

Note: Once you’ve solved the puzzle, don’t forget to go back and talk to the character again to unlock them.

The third puzzle of this level is located on the other side of the large wheel. You’ll find a purple sign indicating that you need to look for clues in the White Dimension, two platforms labeled A and B with enemies you can’t attack, two pressure plates, and two -/+ buttons labeled A and B.

When you activate the White Dimension, you’ll see the // symbol (meaning “parallel”) along with two labels showing 20°. These are the values you must set using buttons A and B so that the two bridges become parallel.

 

After setting the correct values on the -/+ buttons, the enemies will climb onto the segments to reach the pressure plates. Then, a new door will close in, trapping the enemies and blocking them. This action will open the door leading to the next character.

Talk to this character, then hit the lever. The large wheel will start turning, and you can go back to speak with the character near the wheel. You can either take the path on the right or return the way you came.

Next, use the large wheel to reach the upper left area and solve the final puzzle of the level. This one is optional, but completing it will reward you with Light Coins.

This final optional puzzle will allow you to earn Light Coins. You’ll see a lone character in the center, several shapes locked behind a door at the top of the screen, a pressure plate below a square, another below two triangles, and a lever that needs to be activated.

In the White Dimension, you’ll notice that on the left pressure plate, you need to recreate the example of a square placed on the perpendicular sign, and on the right pressure plate, you must place a triangle so that the two triangle angles are parallel.

Once both shapes are placed correctly, talk to the character again to unlock them. Then, backtrack and take the path above the large wheel.

Use the square block to climb up the path leading to a lever that will unlock the door to the next part of the level.

Then, reuse the square block to reach the path on the left, which will lead you to the level’s exit.

Jump into the door to finish the level!

M1_03 | Dividing waterfall

This level is made up of several sections where you’ll need to stay observant in order to solve the puzzles. First, collect Light Coins by defeating enemies and using the Light Well found in the first area of the level. Then, take the path to the left to access the rest of the level.

In this level, you’ll need to remember numbers you encounter along the way. The first one you’ll find is the number 1 inside a triangle, located just above a Light Well.

Continue climbing the platforms until you reach the first puzzle of the level.

In this puzzle, you’ll find 6 squares inside a box visually connected to 3 pressure plates, and 2 triangle blocks in another box connected to 2 pressure plates. When you activate the White Dimension, you’ll notice ÷ symbols under the pressure plates. You’ll also see the number 6 above the first three plates and the number 2 above the next two.

You’ll realize this puzzle is about division. You need to distribute the 6 squares and 2 triangles evenly across the pressure plates below:  

  • 6 squares ÷ 3 pressure plates = 2 squares per plate.

  • 2 triangles ÷ 2 pressure plates = 1 triangle per plate.

Once the blocks are correctly placed, the door will open, allowing you to continue to the right.

In the next section of the level, you’ll need to pick up a square block and place it on a pressure plate. After that, you’ll be able to meet a character located on the left.

Talk to this character, who will thank you for clearing the path that allows him to visit his brother, visible on the left side of the screen. Then, head back to the right and take the upper path, continuing to the left until you reach the next puzzle.

In this new puzzle, look on the left side of the screen — you’ll see shapes: a square with the number 1, a circle with the number 3, and a triangle with the number 2. On the right side, there’s the number 6 below a pressure plate that must hold one of these shapes, four squares placed above two -/+ buttons, and the number 18 displayed under the door you need to open. You can also see several × (multiplication) symbols.

 

In the White Dimension, you’ll notice it’s a bracketed formula where two variables must be added together.

To solve this puzzle, understand that circles are worth 3, squares are worth 1, and triangles are worth 2. First, there’s an initial calculation: ❍ × ❒ = ?. So 1 ❍ valued at 3 × 4 ❒ valued at 1 = 3 × (4 × 1) = 12. Enter the result using the -/+ buttons.

Next, determine which shape to place on the left pressure plate. You need to multiply that shape by 3 (the circle’s value) to get 6. Since 2 × 3 = 6, place the triangle on the left plate. In other words, you’re solving: 

(❍ × △) + (❍ × 4 ❒) = (3 × 2) + (3 × 4 × 1) = 6 + 12 = 18.

 

Once you’ve solved the previous puzzle, climb the platforms and take the path to the right until you can jump down to reach the large wheel that just activated. Speak to the character located above the first puzzle you encountered.

Now that the large wheel is running, you can reach a small ledge to its left. There, you’ll find a square marked with the number 5. It’s time to head to the next puzzle.

 

Go back to the right-hand path from the first puzzle you solved to reach the next puzzle.

Take the path that climbs upward using the platforms, and you’ll reach a junction with a platform on the left decorated with blue mushrooms. Follow that path and head to the right. After jumping across a few platforms, you’ll arrive at the next puzzle, where you’ll see the number 3 inside a circle, along with three -/+ buttons below the square, circle, and triangle icons.

 

Remember the shapes you spotted along the way: 1 in a triangle, 5 in a square, and now 3 in a circle. Use the buttons to set the corresponding numbers beneath each shape to open the door and talk to the last friend in the level.

Go back the way you came and jump into the hole beneath the large wheel. There, you’ll reach the final puzzle of the level. In this section, you’ll learn how to use the scale, which allows you to compare two values and create fractions (or divisions) using blocks placed in each basket.

To solve this puzzle, you’ll find several round blocks in this section, each marked with a number: 5, 1, 2, and 6. You’ll also notice a clue nearby — the number 0.5.

You’ve probably guessed it — using the scale, place the circle marked 1 on the left and the circle marked 2 on the right to create 1 ÷ 2 = 0.5.

Once you’ve entered the correct answer, the final door will open, leading you to the exit.

W1 - 04 - Big wheel, small wheel

In this level, you encounter a first puzzle that introduces the Matter Creator mechanic.

Here, it allows you to create triangles:

  • button A adjusts the main angle
  • button B adjusts the length of the opposite side
  • the lever creates the shape (and replaces the previous one)

In this puzzle, you can see a triangle above a pressure plate.
The goal is to reproduce the same shape.

Solution: set A = 60 and B = 3.
Activate the lever, then place the triangle to activate the wheel and move on.

At the top of the wheel, take the left path to collect the coins, then go back down and talk to the character near the blue mushrooms.
After that, head to the right.

You will find a triangle in a corner to solve the next puzzle.

The purple panel indicates that you should switch to the white dimension.
This allows you to see the path you need to follow to move the triangle onto the pressure plate and activate the wheel.

In this puzzle, a Y button lets you move a platform.

The panel tells you to switch to the white dimension, where a grid appears.
You can then notice a symmetry between the fixed platforms on the left and right.

The goal is to reproduce this symmetry with the movable platform.

The middle fixed platform is located 3 units above the axis of symmetry (Y = 0).
So you need to set the value to Y = -3.

Once the value is set, activate the button to position the platform correctly.
You can then talk to the character on the left and continue to the upper-right section.

In this section, you can observe a symmetry in the background between two triangles across a line.

A line between the two wheels also indicates the axis of symmetry to follow.

The -/+ buttons allow you to spawn platforms on the left wheel.
Since there are already 3 platforms on the right, you need to create 3 platforms on the left to activate the wheel.

In this final section, a new symmetry puzzle allows you to reach the character at the top left and exit the level. On the left, you can see three shapes on a blue background: a right triangle, a square, and an isosceles triangle. Switching to the white dimension reveals a line of symmetry on a grid.

You can move platforms using pressure plates with A -/+ button and B -/+ buttons.

The right triangle is already correctly placed symmetrically.
On the right side, you have an isosceles triangle and the Matter Creator.

By deduction: create a square with the Matter Creator and place it on the middle plate, then set A = 3, then place the isosceles triangle on the right plate, then set B = 4.

W1 - 05 - Mines Maze

This level is made up of several areas to explore around a central wheel and a character.

In each area, you will find a button that disables a barrier blocking the exit path, located at the top.

 In this guide, we start with the upper-left path, but you can explore the areas in any order you prefer.

Head toward the upper-left path and follow it.

You will find a first button that disables one of the barriers leading to the upper path.

At the bottom-left of this area, you can fight an enemy and collect coins from a bush.

By switching to the white dimension, you will discover a hidden path leading to a character.

Then return to the central wheel.

Now take the lower-left path.

You will reach a logic puzzle involving levers.
Activate them to move the enemy onto the pressure plate.

Once the enemy is in position, deactivate the right lever to keep it on the plate.

A door opens at the top right, giving access to a new area.

In this area, you will find several blocks with values (3, 4, etc.) and scales with two pans.

Between the pans, symbols indicate the relationship to satisfy ( > or < ).

1 – Start with the > scale:
place the 4 block on the left and the 3 block on the right (4 > 3).
This activates a lever and unlocks access to the 3.3 block.

2- Then use the < scale:
arrange the blocks to get 3 < 4.
A platform activates, allowing you to reach the 3.8 block.

3- Finally, on the pressure plate between the two scales,
place the 3.3 and 3.8 blocks to obtain the required result 7.1.

A platform unlocks, giving you access to a button to exit the area.

Head to the path on the right of the central wheel.

Near the hint, switch to the white dimension to reveal a hidden path on the right leading to a character.

On the left, you will find a puzzle with scales and red and green orbs.

In the white dimension, you can see the inequality:
2/8 < 6/4

There are not enough orbs to represent these values directly.

You need to simplify the fractions:

1/4 < 3/2

Place the corresponding orbs to satisfy this relationship.
The door will open.

Once you have explored all three paths, return to the central wheel and talk to the character to add them to your compendium.

Then head upward to exit the level.

W1 - 06 - Kotyr, the Leaper

In this level, you face Kotyr in a mental math challenge.

The values are generated randomly, so the examples shown here may differ from your game.

Kotyr stands on a platform displaying a fraction (for example 6/8) and throws projectiles at you.
He can move between several platforms (such as 10/20 or 4/16).

You have access to several levers corresponding to decimal values (here: 0.5, 0.25, 0.75).
Each lever matches a platform: 6/8 → 0.75 | 10/20 → 0.5 | 4/16 → 0.25

Your goal is to activate the lever that matches the platform Kotyr is standing on. If you choose the correct answer, the platform disappears, Kotyr falls, and you can attack him If you choose the wrong answer, the values and levers are reset

In this example, activate the 0.75 lever to make Kotyr fall, then attack him.
He will then move to the right for the next challenge.

In this second phase, the principle is reversed:
you must match decimal numbers to fractions.

For example, if Kotyr is standing on 1.5, you need to activate the button corresponding to 30/20 (= 1.5).

Other possible matches 12/18 → 0.66 | 32/20 → 1.6

The system works the same way. A correct answer makes Kotyr fall while a mistake resets the values.

Tip: take your time to mentally match each button to its platform before acting.

Once hit, Kotyr retreats to the top of the level.
A platform appears, allowing you to follow him.

A final type of challenge must be completed twice to defeat Kotyr.

This time, the difficulty increases: platforms and buttons mix fractions and decimal numbers.

You need to match them correctly in both directions.

After hitting Kotyr twice, you unlock a new ability: shooting arrows to hit distant targets or enemies.

A short tutorial then lets you practice this new skill.

A final tutorial shows how to use arrows going forward.

An enemy stands behind a wall, and you cannot proceed until it is defeated. Your arrows are not upgraded yet. It takes two shots to defeat the enemy. Then, shoot an arrow at the lever to open the door.

Be careful:
if you hit the lever again, it switches back and closes the door.
If that happens, shoot it once more to reopen the door and exit the level.

W1 - 07 - The right combination

At the start of the level, a door blocks your path.

The purple panel tells you to switch to the white dimension.
You can then observe two formulas : f(x) = 3 and f(x) = ? + ?x

You will also notice that circles have a value of  squares have a value of  (and these elements can only be moved in the white dimension).

By observing the areas, you can understand that you need to add circles in the blue zon, squares in the red zone to obtain 33.

This corresponds to: f(x) = 3 + 5x with x = 6, so: 3 + 5 × 6 = 33

You then need to set the value of x = 6 using the -/+ buttons to complete the puzzle.

The door opens.

At the second puzzle, switch to the white dimension.

You observe a relation such as x – 2□ = 1, or x = 2□ + 1

There is not a single solution here. This puzzle is based on experimentation. Try different values using the -/+ buttons.

When you enter x = 3, a platform activates. This is the only value that works.

You can then deduce that a circle ❍ = 3 and a square ❒ = 1

Use the platform to reach the target and open the door.

In this new section, keep in mind that ❍ = 3 and ❒ = 1.

A square is already placed on a pressure plate. If you add a second square, the plate turns green, indicating the correct combination.

In the white dimension, you can observe the formula ? – 2 = 4

Substituting the values ? × 3 – 2 × 1 = 4   <>  ? × 3 = 6   <>  ? = 2

You need to place 2 circles on the left plate.

Once the combination is correct, continue to the next area where you will find a target.

Shoot an arrow at the target to free the character on the right.
Return via the central wheel to talk to them and add them to your compendium,
then continue to the right.

At the fourth puzzle, switch to the white dimension.

You observe f(x) = 2x + 5 and a door requiring f(x) = 15

Solve the equation: 2x + 5 = 15  <>  2x = 10  <>  x = 5

Enter x = 5 using the -/+ buttons.

Then stand on the platform below the target and shoot an arrow to move it to x = 5.

 If you are not standing on the platform when you hit the target, you may not be able to reach the next section.
You will need to reset the platform to x = 0, then try again.

After this puzzle, use the white dimension to spot a hidden cave behind the door.

Enter it to find a character dressed as a vampire.
Talk to them to add them to your compendium, then continue along the lower path.

In the next area, switch to the white dimension. You will notice that you can shoot an arrow at a target. This allows you to open the door leading to the Matter Creator.

Observe the perpendicular symbol above the square. Recall a previous level: this symbol corresponds to a right triangle.

Create a triangle with a 90° angle and place it on the upper plate.
A trapdoor opens and drops the square.

Place this square on the lower-left plate. Then, create a triangle with a 60° angle (as shown in the white dimension) and place it on the lower-right plate

The door opens to the final puzzle.

Final puzzle of the level. You observe: f(x) = 67 ; ❍ with a value of 1 ; ❒ with a value of x ; and △ with a value of x².

In the White Dimension, the formula is replaced by a + bx + cx². You can therefore conclude that the formula to solve is f(x) = a❍ + b❒ + c△ = 67.

In the White Dimension, you also notice that the squares ❒ can have possible values of 2, 4 or 6 and the triangles △ can have possible values of 2, 3 or 4. You need to find common values because x cannot be associated with 2 different values in this formula. The only common values are 2 and 4, so: x = 2 or x = 4.

Then you notice that you can use up to 5 ❍ with a value of 1.

  • If x = 2 : ? × ❍ + 2 × (❒ = 2) + 1 × (△ = 2²) → ? × ❍ + 4 + 4 = 5 ❍ + 8 < 67. In this case, even with 5 x ❍ = 5, you will not be able to obtain 67 because 5 + 8 ≠ 67.
  • If x = 4 : ? × ❍ + 4 × (❒ = 4) + 3 × (△ = 4²) → ? × ❍ + 16 + 48 = 67. In this case, 67 – 48 – 16 = 3. So by adding 3x ❍ = 3×1 you will obtain the correct result: 3 + 16 + 48 = 67.

The solution is therefore f(x) = a❍ + b❒ + c△ = 67 = 3×1 + 4×4 + 3×4².
In the White Dimension, you must place 3 ❍ in the turquoise area (a), 4 ❒ with a value of 4 in the orange area (bx) and 3 △ with a value of 4² in the blue area (cx²). Once the correct combination is set, the path to the exit appears.

W1 - 08 - Climbing to the underground lake

Follow the path until you reach an area with two large wheels.

You need to unlock a door to make a square block fall.
👉 To do this, shoot an arrow at the hidden button in the top-left corner.

The block falls and allows you to reach the next section, leading to the first puzzle.

At the first puzzle, switch to the white dimension.

You observe an equation: 3❍ + 1❒ = 1❍ + 5❒, its simplified form: 3❍ – 1❍ = 5❒ – 1❒, as well as an example to guide you

👉 Start by shooting an arrow at the left target to release the 5 blocks.
The right target lets you collect coins.

Above the scale, you see ❍ = ?❒. Using the simplified equation 2❍ = 4❒  <>  ❍ = 2❒

Place 1 in the left pan ans 2 in the right pan.

The door opens.

Just after this puzzle, stop on the fragile platform to fall into a hidden area.

Activate the lever to free the blue character, then talk to them.
Go back and take the left path toward the large wheel.

 

You will reach a target. Shoot it to activate a moving platform.

Use it to reach a cave on the right and talk to a green character.
Then continue along the upper path to reach the next puzzle.

In the second puzzle, switch to the white dimension.

You observe 2❍ = 2x and 2x > 4.

This leads to x > 2, therefore ❍ > 2.

In the normal dimension, set ❍ > 2 using the -/+ buttons. Then, stand on the platform to the right and shoot an arrow at the lever.

The platform rises and the barrier opens.

In the third puzzle, you see two inputs labeled ❍ = ?In the white dimension, you observe (❍ – 3❒)(❍ + 4❒) = 0 along with an example: (❍ + 1)(❍ – 1) = 0  <>  ❍ = -1 or ❍ = 1

This example shows that if a product equals zero, then at least one of the factors must be zero.

In your case either ❍ – 3❒ = 0 or ❍ + 4❒ = 0. If no value is given, then ❒ = 1.

So ❍ – 3 = 0 <> ❍ = 3  and ❍ + 4 = 0 <> ❍ = -4.

 Enter ❍ = 3 on the left input and ❍ = -4 on the right input

Both wheels activate and open the path to the exit.

W1 - 09 - Quatren, tentacular guardian

You face the World 1 boss through 4 gameplay phases.
You need to think quickly while avoiding attacks to keep your light coins.

In this first phase, solve the equation:
2 ❍ + 4 = 14 <> 2 ❍ = 10 <>  ❍ = 5

Shoot an arrow at the 5 button. Rocks will stun the monster.
Take the opportunity to shoot it with an arrow: it will flee to the second phase.
A block will fall to help you move forward.

In this new area, you observe two pressure plates labeled a + b  and a hidden number: 10. You need to solve: a + b = 10 using x, 1, and -1 blocks

Switch to the white dimension to discover that x = 3

To reach 10 place 3 x blocks on plate a (3 × 3 = 9), place 1 block of 1 on plate b.  9 + 1 = 10

Then, activate the projectile button at the bottom left , stun the monster  and shoot it with 2 arrows.

It flees to the third phase.

This phase takes place in the same area as the first one. The number 15 is shown on the stalactite above the monster.

Solve the equation:
3 ❍ + 6 = 15
3 ❍ = 9
❍ = 9/3 =3

Shoot an arrow at the 3 button.

The monster is stunned: shoot it once to make it flee to the final phase.

Final phase.

You need to solve a – b = 17

Switch to the white dimension to see that x = 5

 Then set up 3 x blocks on a → 3 × 5 = 15 and 2 blocks of -1 on b → -1 + -1 = -2

So, 15 – (-2) = 17

Then, activate the projectile button, stun the monster and shoot it with 3 arrows.

The boss is defeated. It was corrupted by the Book of Chaos Theories. Talk to it: thanks to you, it regains its senses.

Take the upper path to exit the level and return to the library.

Back at the library, go speak with Psyga on the third floor.

Give them the Book of Chaos Theories you recovered from the boss.

You can now access World 2 from the world map.

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