If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Welcome to the most elite sniper team in the world. Defend your base at all cost! 4 Snipers, 12 guns and 3 bonus weapons in this 1.5 update!
1-4 - To switch between sniper positions.
Space bar - To enter/leave zoom mode.
Mouse - Aim and shoot.