You are a puny not so brave gladiator, but you are in the Arena and you need to fight your way out.
Attack your enemy when you see him draw his weapon back in the Arena.
Use your Right arrow key to stab your opponent and the Left arrow key to block his thrust with your shield.
You win if your opponent runs out of energy before you do. If you run out of energy before your opponent does, you lose and the game ends.