[Android][Free] Antibiotic

Hello everybody,

Recently me and buddy finished a game that we were working on for some time.
Its a small game for mobile platforms and can keep you on a edge, fighting to defend your body from the invaders.

Here is a link to the game for everyone that whants to download it:
https://play.google.com/store/apps/details?id=com.gabyandani.antibiotic

You will need an Android os to play it.
You can see screenshots and video in the same link.

I would like some feedback from you guys, on what needs to be improved, what can be changed, your overall impression of it, what can be removed, how is the difficulty on it.

Thank you and i hope you enjoy playing it.

Daniel.