Invaders from Alpha Centauri - now available for free on Google Play

Alien invaders from nearby Alpha Centauri star system come to invade Earth. It is up to you to defend it. Fight in space and on Earth. Play levels 1 through 15 on easy, medium, and expert modes. High scores feature allows you to keep track of your past scores for each skill level.

Now available for free on Google Play

https://play.google.com/store/apps/details?id=com.ericsweeten.invadersfromalphacentauri