Kromasphere: YAGAC MD, Sega Genesis
Kromasphere is a platforming adventure game developed by CMC Games where you control the Ninja and you have to collect color orbs in order to progress through the level. Each orb adds a new platform that allows you to reach previously unreachable locations.
There are 8 worlds that need color restored to them, and each world brings a new theme and set of enemies. The levels are long, and exploration is a must.
If you're into platforming adventure games, Kromasphere will keep you busy for hours!