It is a FPS game. In the game, you find that many demons are bullying doudou, your sense of justice give you courage to protect poor doudou. Use your sharpshooter, shoot down the demons, and protect doudou. There are 6 missions. in each mission, there are many demon and some items: fruits, bomb, flying demon and so on. Fruits can make demons bigger, or smaller,or move faster, even split. Flying demon yields demon every 2 seconds. There are some super bomb,so you must be careful. Note that after the sharpshooter fires, it need 0.5 second to cool.