Build the toy plane.
Finish playing the piano.
Light the fireplace.
Blow out the candle.
Solve every star constellation at least once.
Complete the game with the "Nirvana" ending in under 30 minutes.
Read every book on your desk.
Play something on the gramophone.
Examine your ring.
Clean up all your toys.
Complete the game with the "Nirvana" ending.
Complete the game with the "Samsara" ending.