WASD movement, 1, 2, 3, to equip Primary, Secondary, Melee, 4 to throw a grenade.
This is based on one of my other games-Endless Wave, in that game, you kill zombies, get score, and you automatically unlock guns after you get a certain score, it felt boring, so I made this game: bigger world, more guns, ACTUAL MAGS, and much more.