If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Fight your way to the top of the ranks, but remember, this is the hurt business, sometimes you need to take a step back before you can move forwards. Getting beat earns you more money, which allows you to upgrade your abilities. Sometimes you've got to leave pride at the door.
Z/X - Punch.
Arrow keys - To move.