If you like Desktop Tower Defense you\'ll like this game. Very fun in 2 player mode. Looks very nice too.
You get to play two levels in the demo, Tutorial and the first level, easy stuff. You have access to 3 types of towers which can be upgraded. You build the towers by converting trees to towers, that cost coins which you can pick up either by walking nearby certain trees or by killing enemies.
The game is also compatible with PSP, so you can play it via Remote Play.
The full game will be avalible for download in 2 days from the US/EU stores.