Deadbuild is a RTS Tower Defence game. Your objective is to defend your village against waves of zombies. They spawn at night so you have time to (macro) gather resources and build defences at day. And when the night comes you can micro your hero and try to keep your village protected from enemies.
Great value. It's a fun game that shows a lot of promise.
I do like the variations on the classic tower defense, where not only do you have towers, but support buildings and moveable defenders. It's a combination I have rarely seen all in one game.
The recent flowers added update does make everything prettier. I haven't played enough to give a depthy review, but my initial reaction is pleased.