I quite like the art, and nice job making your own sound! A bit hard to see at times and somewhat buggy; the camera doesn't shift after killing the first enemy and the resolution didn't look right on my computer. Controls are a bit hard to use, the character slides more than I'd like. It would also be nice if dying respawned you at that level instead of the start of the game. The art style is really sweet though and I love the tune!
I'd appreciate it if you check out my game too if you have a minute!