Really cool game, especially for a jam. It's pretty hype, between the gameplay and the soundtrack. I loved the iterability for the game, where you go as far as you can, fail, build a better ship, and try again. Very entertaining.
If I were to change one thing about this game, I'd maybe make the spikes deal more damage. It kind of seems better, after a certain point, to just leave them out in place of better blocks.
Overall great game. Very fun/entertaining.