The main aim of this game is pretty simple. As the main aim is to- infect!! If you play through the tutorial of the game it is helpful as it shows you what the game is about and what you really have to do. The main game buttons are in the bottom right hand corner- these are for if you want to upgrade, change the settings or save the game. The controls for this game are really simple as you just use your mouse. Its a fun game as you go around unlocking countries and then infecting them!