What a well-designed game! The shoot-to-stun, bump-to-kill mechanic feels reminiscent of single-screen arcade classics, without being derivative. I liked the variety of enemies and the vibrant colors. The pixel art all looks fantastic, both static and in motion.
I did encounter a bug on the first level featuring flying enemies. I stunned an enemy near the top of the screen. When I bumped into it to defeat it, my own character's little hop pushed me above the top of the screen, where I was stuck :(