Here are some cheats and tips for the game Batman.
Extra lives:
Level 3
Collect the extra life at the far right end of the first level
of the museum. Jump onto the rising platforms. Jump back down
when reaching the third platform or when the screen scrolls up
to collect the extra life again.
Level 5
Reach the second platform at the top of the level. Move off
the left side of the screen and fall in a straight line to collect
three extra lives while losing one life.
Easy driving/flying levels:
Stay in the upper left corner of the screen to avoid all enemies.