Defend your land from enemies that move on multiple paths, and have 4 different spawn portals! Plan your moves carefully and unlock new weapons as you advance.
It's fun and a little bit hard from the begining but when you have all the gun, know the rules and the Income's over 3.000= it's easy to beat the game but when you play it for a long time, you'll bored. I leave it when I was in the 53rd round. Have fun