First off, I can't see why anybody would launch a single rock where three rocks are so much more effective. Also, increasing the arc doesn't seem to improve the force of the rocks. This game is basically just launch and hope you get lucky. Boring game mechanics, lousy music, and you'd think the impact would be more forceful. Weak. 2 stars.
These badges are way too easy.
As for the game: I didn't bother going past the third day because I was nearly half-blind from clicking all the wittle zombies.
Fun game, but I simply can't stand it when upgrades aren't fair. Mobility isn't really important in this game, especially when you can just blast the enemy away. 4 stars.