The boss fight is freaking awesome! During the boss fight, I got Just Shapes & Beats vibes at first glance, and I really liked that.
I did run into a couple of bugs, though. The boss fight feels very different depending on the screen resolutionplaying in windowed mode versus fullscreen changes the experience quite a bit. Also, if I resize the window during gameplay, my character seems to get stuck.
Other than that, I really loved the sound design and the boss fight. It was a really fun experience!