Not a bad concept...but
This is the game that wouldn't end...I eventually gave up on the game after reaching 1,000 points thinking "When will this stop???" I have a suggestion, instead of making the rocks take away points, why not have a life gauge where if you get hit 5x (or something like that) you get knocked out and the game is over...challenging people to improve upon their score. As it is, it's not a bad idea...but it needs to end SOMETIME!