A really solid game. The art and lighting were great and really added to the ambience of the level. The idea of constantly changing characters each with distinct gravity/jump etc was really nicely done.
Getting caught in middle of a jump was always a slightly scary for moments. The only thing I'd change which is probably more of a personal preference would be the timer UI somehow represented closer to the player character. I found myself so focused on the platforming that I'd often be caught unware by the timer. Either that or a distinct ticking sound or something like that.