- This is a sophisticated tower defense game located in a neat environment with forces of nature in your hands. Control the Bugs! Use the building modules of the flower. Place these elemental towers on the ground to prevent bugs from reaching the right and bottom side of the arena. Game controls: Mouse- To drag and place towers. Escape- Clear cursor. S- Sell tower. U- Upgrade tower. F- Fire TNT tower. N- Start or next wave. Space- Pause. R- Restart.