新增关卡21、22，通关后解锁。
优化关卡光效，解决图像设置较低情况下，太过黑暗问题。
大剑士技能优化，新增技能旋转剑刃。
火法师技能优化，新增技能火墙。
火龙新增技能，喷火。
刺客新增技能，穿刺。
野蛮人新增动作，旋转攻击。

Added new levels 21 and 22, which will be unlocked after clearing.
Optimize the light effect of the level to solve the problem of too dark when the image setting is low.
Optimized the skill of Great Swordsman, and added the skill to rotate the blade.
The fire mage skills are optimized, and the fire wall of skills is added.
Fire Dragon's new skill, Spitfire.
Assassin’s new skill, piercing.
New action for barbarians, spin attack.