This might be dumb, but I absolutely love you gave your game an icon in the start screen. It's such a subtle change but really makes you look at the game as more than just an application
First of all I got to say. Although the UI is very basic, it serves its purpose perfectly. I always knew what I could and couldn't do. The visual effects also when you hit enemies is amazing. I love that darkening of the screen and the bright flash of an enemy dying
There's really not much to say. I really enjoy this game and see not many flaws in terms of the user experience. Maybe just make the game a bit less bland at times (background) and make the enemies a bit more than just floating headphones that don't move? That would make this game perfect in my eyes.