I really liked this game overall! However, it was much too short; I feel like the concepts could have been fleshed out a bit better if you gave the game a little bit more time to "cook", so to speak. I also agree with Justin that the controls could be improved if the aim were mapped to the mouse direction. I don't see too many bullet-hell-type 2D shooter games, so the idea is certainly unique, and I would love to see it fully implemented. Great work!