Very good art, and music is nice. I think there should be some indication that an enemy is getting hit or that I'm getting hit in some way (change in color/sound effect). The music does get kind of repetitive and some of the walls in the game are slanted but still allow you to jump from them. You can also jump really high if you jump from the corner of a block or something like that. Aside from these problems, I still think this deserves 5 stars for everything, so amazing job!