What a pleasant surprise! I wasn’t expecting much since the game doesn’t have a cover image, but I was pleasantly surprised to find this game. It’s really fun, the special effects look beautiful, and the controls feel really solid.
My suggestion would be to change the background to something with texture, so it’s easier to tell that you’re moving. Also, adding more enemy types would make the game more interesting. Finally, a death screen showing your high score and how long you survived would be a great addition.