1.Press the green flag twice 2.Control P 1:"W S"to move"A D"to turn "SPACE"shoot P 2: up down key to move left right key to turn "0"shoot 3.Shoot the UFO that's moving towards you 4.Press"P"to open the shop 5.Click the buy button if you have enough cash 6.Use"1,2,3......"to switch guns
