Awesome game, with perfect controls.

The control scheme is so easy, its user friendly. Its basically about controlling the trenches, and sending your guys in waves from your trenches to overwhelm the enemies. You have to stock up your trenches as you fight the enemy. Its best to send your army wave after using your support abilities to thin the enemy lines. Of course, the enemy can bomb you right back, so timing is everything. One suggestion is to have maybe more units and more levels of upgrading and the units should change apoerance when upgraded.

Spirit Walk about 2012 Zombies vs Aliens