Your goal in this fun, addicting, and challenging strategy game is to make smart decisions in placement and upgrades of towers in order to stop enemy advancement. Fight off fleets of vehicles with carefully placed towers and gummy strips. There are 50 levels in all, bosses here and there, unique forms of waves as you progress, and also a final boss at the end if you can handle it. Use YOUR MOUSE to choose and place towers as well as perform upgrades. Click the Send 'Em button to advance to the next level. Good luck!