That tele-rabbit and the sound it makes when it jump is so cute. The graphics are good and fits well in the game setting. It is short but fun.
If I may suggest, add a few seconds delay before start.
Like "3... 2... 1... GO!" that way we can at least become aware of the map structure in short time which compensates for map randomization each run.
Also, what is the point of changing the song whenever we clear the level? Is there an ending or something we can discover in the tower?