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.