I tried out some new dev ideas and ended up making a loosely based port of Batman(Nes version).
Game instructions:
start the game with the reset button.
Move the player with joystick left and right, Push Up to shoot and fire to jump.
To get to higher platforms you can jump from the walls.
On each screen shoot the enemy with the gun. shoot him three times to remove him and then the platform he stands on
and the exit door is activated. After activation You only need to touch the door to move on to the next screen.
Move through the screens to eventually face the Joker.
BATMAN_NES_NTSC.bin
BATMAN_NES_PAL60.bin