Not too shabby. It's a simple game, but simple doesn't necessarily mean bad, as simple can be addictive and fun, which this game could be. I did like dodging around the enemies, weaving through them and slowly seeing my player upgrade in tune with the music. However, right now, I felt like the game is a bit overly plain and lacking which hurts it's presentation and lasting appeal. First, the controls were a bit odd. I have no idea why the player sprite turns in the direction of the mouse: you'd think it would mean you can shoot in that direction, but I couldn't find a fire button, so why does this exist? Bit weird to use a triangle as well for the player since it would usually mean that W would move you forward, not up, like a rocket in an old Asteroids game. Anyway, the music is cool, but I feel like it's doing all the heavy lifting and without it, the game wouldn't have much. I think the game does have a solid theme going with music since you're already have the player upgrade at certain phases of the song. Because of this, I would change more elements as the song goes on: add new enemy types, make enemies more aggressive, and so on. I think you should make all the visual elements of the game pulse to the beat like other music-based games do. Also, I feel like there should be some more special effects not only to add pizazz, but help communicate elements like enemies spawning in or dying. I recommend looking up a video called 'Juice it or Lose it' which shows how simple games can use cool techniques and effects to make it more exciting.