Galaxy Ninjas – Amazon Appstore for Android – Free app of the day

Obliterate aliens in this action-packed 2D ninja game! Dodge obstacles, collect power-ups, and survive challenging boss battles. Collect coins and then visit the Dojo to customize your ninja with new outfits, weapons, and power-ups. Four modes: Classic, Expert, Endless, and Insane. Best on higher-end devices.

Get it here
http://www.amazon.com/mobile-apps/b/ref=topnav_storetab_mas?ie=UTF8&node=2350149011
http://www.amazon.com/gp/product/B008AZS6I0?ie=UTF8&ref=mas_faad