Flying tank:
Begin game play and reach level 2. Wait until the timer approaches zero. Move the tank off the edge when the timer is at zero. The tank will explode and the timer will be reset. The replacement tank will be able to fly and attack from outside the ship. Note: This effect lasts until the timer reaches zero again.

Super cannon:
Move to the tip of the left wing on level 2. Continue down past the last pipe and wait. A head icon with a powered-up cannon will appear.