Complete the game.
Solve level 25 with only 5 rules.
Get the sakura flavored drink in level 22.
Solve level 21 with only 4 rules.
Solve level 16 with only 4 rules.
Solve level 15 with only 3 rules.
Jump into water.
Try to open 15 locked doors throughout the game.
Successfully create your first endless loop.
Listen to one of the record players in the game.
Solve two puzzles in a room in the wrong order.
Buy all drinks from a vending machine.
Sit down to rest on one of the chairs in the game.