fun concept! smart to efficiently use the same level but changing it up through rule changes such as player controls and speeds or small level gimmicks, it worked pretty well. graphics are nice and sfx is pretty decent. the only thing i can maybe critique largely is how slow the player is, since some of the changes were pretty basic that the whole level was the same except for one tiny thing which didn't really alter the experience that much. for instance, player changes made the whole level play different but level 7 only had one change at the end which made the rest of the level just monotonous. if the player was faster overall with more momentum it would've alleviated this a bit. otherwise, good potential.
nice work!