Been working on the artwork for the new Tower Defense on my wife's Cintiq.

I think i have settled on a style.

Here is the logo for Tank TD:

Thanks and turrets all have that drawn/gradient look. The ground is tiled  and has a pallet of about 10 tiles.

Working on the upgrade and sell systems for the game. A* Path-finding, turrets, enemies, gold, purchasing all works, and all developed in Unity3d as a 2d game and will release to as many of the platforms as it supports.