Nice Game!
I've seen a similar game but with anime characters. I've got to say that this is a nifty little idea. The only flaw I can come up in the design is that it's about 95% based on luck. My all time low score is 83 and my all time high is 1326 (I hit three explosive barrels in a row.) The point is, it pretty much didn't matter where I shot it or how hard I shot it, it's all based on what it hit, which is, of course, randomly selected.