Why complete a dozen levels to face the end boss if you can go head-to-head right now in this fighting game. Use WASD KEYS to move, press "J" KEY to attack, "K" KEY to run and "L" KEY to limit break (depends on sword type). Press SPACEBAR at any time to open the upgrade menu. You will get experience by performing a successful attack. Don't forget to distribute your XP points in upgrade menu. Attack the thief to obtain a random stone you could use to upgrade your weapon. Good luck!