This is a very easy game to pick up and play, but can be a real drain on your time, especially if you don't have half an hour to play each time.
The concept is like the game "Othello," except your "Coloreez" will "jump" into other squares when you get 4 in any box, which often causes a chain reaction of jumps.
The large-scale maps can be hard to view, requiring side-to-side scrolling; I always have to pinch the screen in order to play, which can make it quite hard to see all the little coloreez.
On the other hand, I've never had a game that lasted less than 30 minutes, so for "long-term" playability, this game is good. I think this game really is quite good for people who like Othello, Connect Four, and maybe even Tetris.