The way you can mess yourself up is cool, shooting too much lends to some cool looking visuals. The rockets could be slower, as the area of play doesn't allow the player to react to the projectiles as they would in traditional 2d bullet hells. Variety in targets may have been nice, as well as making said targets more visible to the player. While holding any direction you are able to negate damage. I was able to keep going up and shooting without getting hurt by my bullets. Nice job on the game, clever idea!