Stack 'em

Stack' em is a match five puzzle game. Unlike similar games, such as Bejeweled, which focus on switching adjacent pieces in order to create groups of identical jewels, here the player can pick up entire sections of a column and place them on a different one. Once a group of five or more animals is obtained, it is removed from the screen. The player gains points and levels by completing more matches. Every move in the game adds to the pressure in the cloning machine, and once the gauge is red, it pumps out another row of animals. It's game over if they reach the top of the fence and escape over it.

A special star piece is introduced at every level up. To win the game the player needs to match five of these star pieces in the final level. There are two types of power-ups as well: the bomb, which when matched up with four identical pieces can take out all adjacent animals to the group, and the freeze, which stops the pressure gauge on the cloning machine.