good aesthetic, music and minimal art style gives it a lot of polish
mechanics work well, although i'd have liked to see a few other ways of interacting to add more variety and open up some opportunities for puzzles. currently the only challenge comes from really tight paths with spikes which encourages making lots of small launches and cheesing with the slowmo. i dont think this takes advantage of the mechanics as well as it could, it slows down the pace which removes a lot of the fun of launching the ball around
seems to be a bug on the 2nd hard level where collecting all the keys doesnt unlock the exit, so there might be content i couldnt access that addressing the previous paragraph