Excellent entry. I played it all the way to the end for the well balanced puzzles and chill vibes.
The small touches of sfx are a small detail that was really well done and added a lot to how polished the game feels.
I would have loved a small thing after the final level noting the end of the game, as I kind of wandered between menus for a few seconds to confirm there was nothing else to do which resulted in a small anticlimax, but that is very nitpicky.
I agree with folks that say an "undo" node button would be welcome. I'm also impressed by the implementation of having the constellation links always go where I wanted to, and never attach to a star accidentally. I don't know why but it seemed like something that could be buggy if improperly implemented but I didn't notice a single issue.