Really cool concept and nice aesthetics! Puzzles (as far as I've played) were pretty simplistic, but otherwise well designed. It took me a long time to figure out I could close the interaction menu with E, I really wish it was possible to click outside the interaction menu to close it since you're already using your mouse at that point. Got to what I suppose is the final room, saw a -2 that I could never reach fall down into the abyss, watched a couple of other boxes follow it, decided to go down there myself because I didn't see anything else to do and would have needed to replay the entire game afterwards? No, thanks. Still, there's a lot of really neat things here already and this definitely has the potential to become a cool puzzle platformer with a little UX tweaking, great job!