Thanks for your feedback - I am glad you liked the game !
I thought about using keys to hit enemies on beat (obviously couldn't get that to work at all in the jam version) but you need to mouse to aim anyway and just "autofire" doesn't quite feel right for that. I'll add classic autofire for a post-jam version just to see how that would work.
Love the idea of making the beat more intense as more and more enemies are on screen while making some nice flashy sounds for combos.
Thanks again for your input :)