I had a lot of fun with this game. The art style is cool, the movement is super fun, and all the boss fights are super unique. The only problems I had were not having enough time to beat each boss. The green and yellow ones in particular were very difficult because of this time limit. I also saw a few issues with keys from previous bosses being loaded in the different boss arenas. Other than that super awesome game!
P.S. Great soundtrack! :)