There's so many tower defenses out there, most of them free, that you have to either innovate or add lots of polish and charm to stand out from the pack, and this game does neither. It is a solid TD with some depth, especially in the later levels, but there's little justification for its price when so many free TDs do everything better. When you get down to it, this game does not feel like a labor of love; it has a mercenary, cranked-out "casual game" feel that kind of saddens me in an indie developer. If you can't get enough TDs and don't care about bang for your buck, go for it, but don't expect to see anything new.
