I have run cool game and it is indeed cool XD
took a bit of time to learn when to click
maybe a visual cue would help to make it easier to understand XD
but after I've learned the game, I feel really powerful XD
I originally had a meter at the bottom similar to crypt of the necrodancer, but since I was working on the game so much I already knew when the beat was so I forgot to include a visual aid. You can sort of use the beating heart, but it's not at great indicator as you only know when it's already happened (so the window is halved).
Thanks for checking it out!