Fun idea! It took a few tries to get the hang of it, but I was able to get a decent chunk of the way through the song. I think the main thing that would help make progression easier would be to zoom out the camera a bit so that the next one or two blocks would be visible. Also, a visual indicator of which color your on would be great as well. Still, I think this idea could definitely be expanded more. It's definitely got potential, and I think it would be great to see!