Rainbow Islands Codes -

Secret room:
Collect all of the gems in the correct order of color: from left to right on the gem counter - Red, Orange, Yellow, Green, Light Blue, Dark Blue, And Violet. The Life and Bonus Gem will be awarded, as well as access to a magical secret room. A silver door will appear at the end of the level. The Boss does not need to be fought. However, if the Boss is defeated, you will get his giant item (food or diamond) plus the two items in the secret room.

On the secret room on the fifth island contains a box that should be collected. There is also a gate marked with a "7", that leads to Island 7.

Gem colors:
The screen is split into several vertical zone. When a gem falls, its color is determined by the "color" of the zone in which it fell. Carefully judge where a dead enemy will fall to create the gem color of your choice.