Instructions
Enter the "Thieves' Forest" level from the world map. This is the sixth level of the game.
Fight your way through the level. This level has no special mechanics. Just keep walking to the right side of the screen to advance. The enemies in this level are thieves and trolls. Thieves attack you from afar using a bow. Trolls are melee enemies that run up to you and attempt to hit you.
Walk toward the abandoned mill at the end of the level. A giant troll jumps out at you. It looks like a large, fluffy black square. Hordes of normal trolls jump off the giant troll to attack you.
Attack the normal trolls spawning off the giant troll with normal attacks. You should be hitting multiple enemies with each attack. This results in a much higher than average rate of experience gain, which causes you to level up faster. Do not hit or attack the giant troll. You want it alive in order to keep creating more trolls. This step can be continued as long as desired to level-up.
Kill the giant troll when you are finished leveling-up.
Walk to the right to exit the level. You can spend the skill points earned from leveling-up at this point.