Cool idea and mechanic, good use of the One Button theme and the black and white limitation. Some sounds and music would have bumped it up a notch. 

I broke it. LOL So first, I wondered if there was a limited number of balls.  So I was taking my time and... then I realized there's not.  So I just started unleashing the gates of hell upon these poor defenseless balls.  First level I did this on was a very sparse level.  no problem.  next level, there was a lot of sources for debris.  The physics didn't like this at all!!! LOL.  Great game, lots of fun, if you expand on it, might consider a fire delay timer or a limited number of balls or tweak the physics to keep the number of entities down when performance starts to lag. Shrug.  Enjoyed it though.

The idea is really cool, reminds me of angry birds. The breaking blocks look great as well! Some music/ sound effects would have been cool though and maybe add something that shoots at the balls (currently it's just the line of balls out of nowhere). Another cool addition could be that the player only has a certain amount of shots. 

i like the movement and the mechanics, i can see an action game around that, or something.
although the effects are very nice, i believe they are lagging the web build. other than that, good job

I loved the game mechanics. Wish there were more levels though