In most cube stacking games you stack,you match,you separate,you lose. Not so with this delightful design. Aliens stacked on one another dont balance evenly,Larger aliens hold smaller ones on precarious shelves that wobble and give way. The upper aliens tilt,shudder,and fall - and it is your job to arrange them before catastrophe befalls. You will love this new approach to a favorite concept - cube stacking,with a twist!