How To Stay Alive: Never stay still, keep weaving and moving during firefights to minimize the damage you take. If you are stationary the tan army will take you out quickly.
How To Kill: Try to get the Bazooka and the Flamethrower power to maximum. Use the Bazooka as your main weapon. It can blow up obstacles as well as cause heavy damage.
How To Sink the Shark Submarine: You have to sink the Shark Sub at the end of level 2. Do this by first killing all of the tan soldiers and then hold L1 and use the right analog stick to move the turrets to destroy the Shark's turrets.
