Play until level 2, then drive the tank off the edge exactly as the timer runs out. Your tank will explode and the timer will reset. Your new tank will be able to fly around and attack from outside the ship until the timer expires.
Super Cannon
A hidden power-up lies on the second level. When you get to the tip of the left wing, move down past the last pipe and wait. A head icon will appear that gives a super cannon blast!
