It is a good idea, but you need sound. The whole point of timing is missed just because you didn't put a music for us to follow otherwise is just frustrating. See how it works on NecroDancer.

Don't wanna be that guy, but I happen to be big into music... And... Well when you say timing, you certainly don't mean av even rhythm unless you go 3/5 to 2/5 to 7/8 to a random 4/4... How do I know when the character will jump if I don't sit and calibrate several times before even trying?

I really enjoyed the game and i rated it, btw if you can try out my game and rate it that would mean a lot :)