Nintendo of America have added Starship Defense as a further downloadable title for Club Nintendo members.
Developed by Q-Games, who recently developed Star Fox 64 3D, it is a sci-fi themed tower defense game in which you are tasked with defending a starship.
You can place turrets all across the starship, using energy gathered from defeated enemies.
Starship Defense is available to download for 150 Coins.
[Thanks Siliconera]