It would be great to have a separate music volume slider. The SFX is so loud that when I lower my system volume, the music ends up being too quiet. I actually used Audacity to adjust the music volume myself. I'd recommend giving it a try, it's free! I didn't have much trouble with the controls, but I didn't really feel the impact when I was getting hit, so some feedback for that would've been nice. Congrats on finishing the game!