Singularis is a sort of shmup for amoebas. You play Proto, a protozoan with the unlikely ambition of becoming the most powerful being in the universe. Initially, you can do nothing more than move (which, in the default control scheme, you do by choosing direction with the mouse and pressing the Up arrow to move forward, or the Back arrow to move back). Later on, you gain additional abilities, including cilia to let you row yourself forward more quickly, and -- I did call it a shmup -- a gun. Or if you prefer, the ability to shoot destructive viruses at enemies.