This is a good start. Maybe controls could work a bit better. I was often stuck at the edge of a mushroom. Music is nice, maybe some sound effects can complement very well. Can see this being build further to a nice game. Good job! :-)
It's true that our game lacks effort in the sound department, and we will fix that as soon as possible. Regarding player control, we've had some difficulties with it, and we will improve that as well!