This game is rad as heck. Its strongest points are the wonderful graphics and very smart level design (the effort you put in really shows).
I do have two small complaints. The first is that, while the powerup progression of the game is generally well-balanced, I found that with certain combinations of powerups, the final boss takes an unreasonable amount of time to defeat. The second is that it is very easy to get hit right after exiting the teleporter; this happened to me at least three times.
Thank you very much for making this game, and I am looking forward to playing the new version!