Go into battle carrying an Eggk-47, RPEGG or a Crackshot. Don't forget to use the power-ups by clicking the chicken-nugget in the bottom and be sure to crack those other eggs in battle. fun!
Move around using WASD. Keep looking around with your cursor to spot enemies.
Shoot your enemies using LMB and use LShift to aim.
Use spacebar to jump.
Use Q to throw a grenade.
Don't forget to reload your gun using R.