My brother and his friend just released this game for free on the Google Play store.
I'll let them describe it
"Antibody Boost is an intense microbe shooter.
Take control of a heroic antibody and engage swarms of dangerous antigens.
In this arcade style shooter use precision shots and time your movements carefully to survive the escalating waves.
Improve your reflexes and master your nerves to climb the online leaderboard."
If you like it please share with your friends
It's also on PC/Mac on their website http://www.circleofjudgement.com/antibody/