The goal of the game is to infect as many people as you can in 30 seconds.
The player uses the arrow keys to move in 8 directions. They also use the left mouse button to fire their virus at the people.
The biggest challenge I had with making this was having A.I move by itself. 10 minutes if futzing around later and I got an idea of what to do. 20 minutes later and the enemies were moving by themselves just like I wanted them to do.