From the publisher:
Two rocking great games in one!
How close to the edge will you go? Balancing Aliens and The Alien's Dance will test your skill as you decide where to place the aliens. But watch out, tip the spaceship and you’ll send it crashing. A great game for family and friends. Balancing Aliens - The alien spaceship has developed a wobble and the aliens must go out to fix it. Don't be the one to topple the aliens!
The Alien's Dance - The aliens are dancing rings around the ship, and the ship is starting to sway. See how long you can keep them dancing!