Very well designed game. The controls felt very smooth and intuitive, I hit what I intended to hit, and I think the game was a fair challenge. Music also matched the vibe, although even at full volume I had to turn my speakers up. I think some of the enemies were a little easier than others (ie the spread enemies) as long as you dashed into their fire at the right time, you could get all of their shots in one dash. Aside from that I felt the game was balanced, with level 10+ being a good challenge.