Fuzzball

CHEATS

Kill four baddies on the bottom of the first level, then die, and on the high score table type "BOB". This should give you infinite lives.

On a really hard level, wait until your time runs out. A swarm of bees will now fly at you. Shoot as many of them as you can. It does not matter whether you die. After losing a life, the bees disappear, as do the baddies. You are then free to complete the level with no foes.