Cause two adjacent apples to fall and intentionally get underneath the first apple. Mr. Do will be flattened, but will not lost a life. Note: The game must be restarted to continue.
Freeze all enemies
Collect the prize in the middle of the screen while the "Extra" apple at the top of the screen is on a red letter.
Pause
Press * to pause game play.
Shoot through walls
Mr Do can shoot through tunnels that are separated by very thin walls.
