You are the commander of a defense tower, surrounded by enemy tanks. Your mission: destroy as many as possible before they destroy you. Tanks will change its color from green to yellow and red before shooting. Kill the red tanks for bonus!
You have a laser to destroy the tanks close and far away, a shield to repulse the enemy, and a radar to detect your enemies. Your laser (L) and shield (S) can get overheated so use them wisely! When your energy (E) is empty,  you will be destroyed. The enemy tanks will shoot you also when you cannot see them, so watch your radar!

           (Q)Fire long
                  ^ 				Space: Shield
                  |  
(O)Turn left <----+----> (P)Turn right	  			
                  |
                  v
           (A)Fire short


GOOD LUCK, COMMANDER!           
***END OF MESSAGE***