Very nice game! I was frustrated by the unusual control scheme at first, but when I got it, it all fell into place. I like how this game is about finding the rhythm and following it, rather than trying to precisely control movement. And a variety of enemies was a pleasant surprise too. My only suggestion would be to maybe make upgrades more varied and interesting, as of now, they feel pretty dull.
Also, the visual presentation and music are just so classy! Loved it.