Puralax is color painting game by Luis Bricker. It's hard to describe. Look at the first image. See how the very top is red? The objective is to paint all the tiles red. See the green square with the white dot? That means you can drag that color onto the yellow squares. All contiguous yellow squares will then turn green. The red square has 2 dots. One dot allows it to be moved next to the green group. The other dot allows you to paint the green group red.
I've completed all 20 levels of Stage 1. Almost done with Stage 2. There are 6 Stages, so presumably there are 120 levels.
You can play online for free!
Puralax reminds me a bit of Zen Color. Read my review from last summer on that.
Puralax has some easy puzzles, but they get tough pretty quick. Definitely a winner.
Update 6/30/14: I've been playing Puralax more and have now solved 93 levels.