The Desert Rumble TD

Maybe you have heard of the rumble in the jungle.  Well forget about that because its tower defense time in The Desert Rumble TD game.  The bad guys are marching down your streets and if you don"t want to let them take over your base you will have to build and upgrade your tower defenses and shoot the bad guys down.  Keep your towers and turrets upgraded and see if you can kill all the bad guys.