Cool idea ! That little lizard is cute and you can feel the mundane in there haha.
Was a bit took my surprised from the start at it went right away into the rhythm game, maybe wait a little 2-3 second before starting it showing the inputs on screen or something, so the player is ready (I'm more of a AWSD kind of guy, so I first made the mistake of trying to use those) also I'm not sure if it was a bug, but I could do anything when the level was over and had to ALT+F4.
Cool game !