Color Match Pro, a sliding tile puzzle game, has just gone Free. This is the first time this game has dropped below its regular price of $0.99 since its release in early August. The game takes a slightly different spin on the popular 2048 games. Instead of merging numbered tiles to advance, you merge colored tiles. It doesn’t quite have the charm of Threes!, the originator of this game genre, but you can’t argue that the price isn’t right.