This game executes a 2D platformer with a twist very well. I wish there was a little bit more in terms of audio flare, but the gameplay is solid and the gimmick is pretty manageable. The idea of cycling powerups is interesting, but I wonder if some levels may be bricked or impossible with certain powerups versus others? I played for about 20 minutes and didn't encounter this problem, but I do think that may be something to consider if you decide to continue development.
The visuals are well done too, with a consistent, neat pixel art vibe that makes the game feel a little more retro without sacrificing quality. All in all, this is a solid game. Great job!