Very clean and well scoped! I love the concept. Graphics are very clean, sound is great, music is great.
When coming up with it, did you have the idea for destructible UI first, and then added a game, or the other way around?
Feedback: From a pure playability standpoint, it would be great if there was a pause menu and restart button/option. In playing around, shooting all of the controls left me floating and waiting for very slow asteroids to hit me, at which point I had to reset the game. 😂
Would have been great to have had more variety in new waves to move it from concept -> more of a game. I imagine exploring some ideas like defending your movement keys would have been really fun, but I imagine that's likely out of scope.
Overall, really great job!