The system creates viruses in any location. Your representative is a doctor. Manually move doctors so that they do not collide with the created system viruses. Avoiding a virus you get one point. The system creates items that protect the doctor from the virus, touches a doctor protection for one more turn to revive. To move the doctor to the right click on the right side of the screen, to the left you click on the left side of the screen. The game will be over when your red block touches the color block of the system. Eat as many protective items as possible so the doctor can avoid the most viruses. good luck.