I like the concept of the game and the story that it is built around. I think the background music is cool but, when you move to the next level early in the game, it gets cut short. Maybe you could make the music persist through levels to allow it to play completely. Also, the textures for platforms are often stretched out so maybe you could have used tilemaps to help fix that. You could also add some kind of sound effect for when an enemy is killed. Overall, I like the story of the game and the way the visual style matches that.