I think the sound and volume choice was not the best in this case! The idea is cool, however, not sure if it was meant like that - no idea where to "play drums towards", except for trial and error!

Cool Idea, I would like to see more visual and audible player feedback.  As the game is so based when the ball interacts with a good wall there is a partial explosion of music notes, while interacting with a sound proof wall could result in a speaker with the red sign marking or no. simple interations that make the player want to explore the world more and try new things.

Really like level five would be great if you had a back button to navigate between the levels