You are Harvey the Bird Man and your aim is to bust five criminals out of prison in order to see if the justice is served or not. To do this, you have to sneak past the security guards to get the keys. When Harvey�s border intersects with the guards border, the guard becomes alert. But, when a guard catches Harvey in his line of vision, he gets busted.
Move the mouse and Harvey the Birdman will follow the cursor. The farther away you move the cursor, the faster Harvey will move.