Very creative concept for a game! Everything is so mysterious and beyond my comprehension, but so well executed. The visuals are also very pretty. The puzzles were simple enough, yet interesting, although it's clear that the focus is more on the choice making.
There were two issues I ran into while playing. First, the text before each choice disappears way to quickly and I often didn't get the chance to read it all the way through (I'm a slow reader). Having the player manually press a button to continue would be a nice feature. Second, the doors blend in with the walls way too much, making progressing kinda hard and made me miss the door that leads to the elevator for a good chunk of time. They really could use some design features that make them stand out more.
Also, the star puzzle in particular should give some kind of visual/audible cue or finish automatically when the player solves it correctly. I was messing around with it for so long before realizing I needed to press escape to complete it.
Apart from that, the game is very enjoyable to play! Fantastic work!