Seek and destroy the enemies within the city using your sniper rifle.
Space: Escape to next zone
HOLD down the mouse button to zoom in. RELEASE the button to fire the weapon. Try to aim for the head for maximum points. There are 3 levels (or 'zones'). Look out for health power-ups to maximize your time in a zone. Hit SPACEBAR to escape a zone when you're nearly out of health. The longer you manage to stay in a zone, the more points you will score.