Rainbow Walker was published by Synapse Software in 1983 for the Atari 8-bit. Developed by Steve Coleman, it is an arcade game where you control Cedrick, a small creature that has the power to add colours back to the rainbow after a villain had stolen all the colors leaving the rainbow gray and dull.
The AtariAge forum user Wrathchild managed to make the conversion in less than 2 days, thanks to the code organization that made it easier to relocate it to the cartridge area.
If you wanna try it, follow the link below. If you are just curious about the game, here is a video of the original version:
[youtube fhXzYNNtDRA nolink]