RetroViral

My take on this theme is the dreaded Stomach Bug. 

Play as a retrovirus and assimilate an army of nasty cells in the belly of your host. As you play you will be surrounded by an increasingly large army, mutated by your RNA, and the hosts white blood cells which will feast upon them. It's an arcade shoot-em-up where the goal is only a high score. 

Controls: arrow keys to move, left click to fire OR right click to move, left click to fire.