you fight against enemy planes. Once it starts, you will be located in the airspace and arranged to shoot down enemy planes which are moving towards you and shooting you with laser weapons. You can use the (←) and (→) key to run left or right for avoiding being shot. Press the spacebar key to shoot. Make use of the number keys to win the game. Once you kill fixed enemies, this game will automatically turn into a new level with higher degree of difficulty. If you can?t kill all of your enemies before they get close to you, you would lose the game. You totally have four lives to continue the game. Play now.