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