Nice idea.
I think the game would have really benefited a music that had a more proeminent beat, and required you to press the key on the beats. Right now, it is a bit hard to understand when the beat will be added.
As others have pointed out, it would have been nice to be able to have a "rest" option, because when you fill up your bar, it becomes very chaotic. I also am not sure about the decision that you can move left and right as you want, maybe having a second tape for movements would have been more on point?
Overall, great entry :)