Cool math games: Swap Wood is a simple and addictive puzzle game. The goal is to unblock the red block out of the board by sliding the other blocks out of the way, unblock it with the minimal moves. Cool math games: Swap Wood comes with 4 difficulties ranging from Beginner to Expert. There are 14500 puzzles in total, the highest amount of puzzles youll find in any game, worth hundreds of hours to keep you challenged and addicted.