Rainbow Stacker is a colorful stacking game in which you have to stop the sliding shelves at the right moment to stack up a giant rainbow tower. Every time your timing is a little bit off, the shelf will end up slightly off-center. Any overhang will be lopped off, making the surface of the next shelf a little smaller. Can you work your way through the full spectrum of rainbow colors? You can keep playing with even the tiniest sliver of a shelf, as long as you don't miss the last layer completely. If you hit a perfect match, you will receive more and more bonus points for each consecutive perfectly timed match.