A resounding okay.
Seven's average and that's what this game was. Drop icicles on cavemen. The same identical cavemen (unless there's some different models later, but I doubt that sincerely). Neat little skill game for sure, but not much else. It's not even that rewarding. Lets face it, in the world of the internet where people can probably write a bot program for this and beat it anyways... the rewards are minimal.
Only one real technical issue. When you have two cavemen on the screen often their motions will sync up to where they essentially become one caveman. However, when you drop the Icicle of Damocles upon them it will invariably only kill one of them. I've not had both die yet. It's of little consequence because you only have to hit one, but still it's frustrating.
So you lose on point for the following:
Essentially identical levels and unfortunate cavemen.
No other challenges besides having good timing.
No other death animations. It gets boring watching the same guy die the same way.
It's fun, but I don't think front page stuff.