This is just a simple skill shooter about little monkey who got tired of being fun of. So he starts shooting with banana peels at humans showing up on windows from the building across the street. The game is freely available on monkeygamesworld.com, where you can see the video walkthrough too.
You play this game only with space bar. When you press the space bar, a line will stop moving. Press it again and you will make an intersection. Banana is being shot at the intersection point.