I'm totally surprised to see so many negative comments on this. I loved it. I'm actually considering paying the $5 to finish the campaigns, etc.
btw - fun way to fully complete the kongregate campaign is to load use one apocolypse cannon, and 4 shields. chain-sheild the shields, and finally shield the apoc cannon. The only unprotected shield put at the bottom... just keep firing the apoc cannon and watch the carnage... 100% accuracy ;)
phore_eyes, its a bit much to call this a "copy". It's heavily inspired by the moai games, sure, but it really expands on the concept, and I think it adds a lot, and overall is a better game than the moai... truly its an example of how the creative process works, everything out there borrows from something else...