You have a pistol, grenade launcher, minigun, and a rifle, swap between them using E and Q (more weapons coming later), and use the left mouse button to shoot your gun. By the way, the grenade launcher has a 3 second cooldown and the minigun needs to be charged for 2 seconds before usage. Use WASD to move. To drive a car, move your mouse over the car and then press r on your keyboard to enter the car. To exit the car, press f on your keyboard. To pause the game, press the space bar. Use the stat window button on the pause menu to edit your stats using the points you get for leveling up.