Fantastic music! This game seems to be related to music? But even though I don't understand music, it didn't stop me from having a lot of fun.
Besides the music, what I liked most was the game's minimalist graphics. However, it seemed a bit difficult for me. The enemies were too small, and the bullets were too slow, making it hard to hit them, especially the teleporting UFOs. When I aimed at them, I had to wait a while before seeing the bullet hit them, but sometimes they would just teleport away, which was quite frustrating.
A fantastic game!