Get the sakura flavored drink in level 22.

Solve level 15 with only 3 rules.

Solve level 21 with only 4 rules.

Solve level 16 with only 4 rules.

Solve level 25 with only 5 rules.

Buy all drinks from a vending machine.

Listen to one of the record players in the game.

Try to open 15 locked doors throughout the game.

Complete the game.

Complete the game without having a puzzle solved by the hint system.

Complete the game without using the hint system at all.

Solve two puzzles in a room in the wrong order.

Successfully create your first endless loop.

Sit down to rest on one of the chairs in the game.

Jump into water.