If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Soldier. There is some job for you. You will receive further orders from your commander Kate. But you must to know - this will be not so easy. You'll need to deliver some secret weapon, save wounded soldiers and all this must be done as fast as possible. So get your Ural Truck and go.
WASD or Arrow keys to drive.
Space bar - Brakes and hand interaction.