Pause the game and type "JUNKYARD" and press 'RETURN'. You are now invincible. Use any of the following keys: 'RETURN'_____toggles cheat mode on and off. 'D'_______________make all locks disappear. 'Z'________________________Warp to level 3. 'X'________________________Warp to level 4. 'C'________________________Warp to level 5. 'V'________________________Warp to level 6. 'B'________________________Warp to level 7. 'N'________________________Warp to level 8. 'M'________________________Warp to level 9. 'F7'_____Increase size of screen and speed. 'F10'________________Make the border flash.