At the main title screen enter: Left, Jump, Left, Start, Left, Fire, Left, Up, Start. If this is done correctly there will be a message in the bottom left corner of the title screen a red "POWER UP!". NOTE: This code will not work if the cheat option dip switch has been turned off.
At the title screen press:
Shoot, Jump, Shoot, Jump, Shoot, Jump, Right,
Start buttons for player one.It will say at the bottom of screen: ORIGINAL GAME. The game will give the PORTALS in some screens,if you can get in them you will get LOADS of diamonds.
