It's so simple. Like most block puzzlers out there your task is to match colours (or in this case coloured animal heads) into horizontal or vertical rows of three or more. You're presented with a grid of jumbled heads to match on the bottom screen and you're able to swap two adjacent heads in order to create your rows. However, you can't just swap any old blocks; you can only swap them if you're going to score from the move. The difficulty (especially later, when the pressure is on) is finding ...