Not bad, it's kind of like some of the old ATARI games. Graphics are simple but fairly smooth; could've use some sort of sound effects or some sort of music. But all in all, I did enjoy it and was a bit of a challenge in some parts. My only real problem with this game was that I couldn't even see the rock/projectile most of the time, which made it a little more difficult to play it. Other than all of that, it's a nice time-waster (a lot better than most "professionally made" time-wasting app games out there)!
P.S. I know this is the creator's first game and I could nit-pick every little thing like some reviewers out there; but this game and the creator both have potential and it 1,000 times better than anything I can ever make. Please keep on being you, psp161!