Xeno Tactics

Yet another Tower Defense game: Xeno Tacics.

An obvious clone of Desktop Tower Defense (even down to the critter waves), but with a twist: the game has six levels, and you can't access the next level until you've completed the previous. Not sure why you score points in this game, as there's no high score (or there is after the last level, but I've still not beaten it...) - it seems kind of pointless that you score bonus points for releasing a critter wave early (just like, you guessed it, Desktop Tower Defense).