Each time your character levels up you’ll be rewarded a skill point. Use them to upgrade your skill. You can buy additional skill points.
Tap the blinking button to increase the skill level. The points that were spent can be reset. If you run out of points, you can buy additional points with Gold.
The skill you’ve acquired are automatically equipped in order, but you can arrange them as you like. There are two type of skill: Type A and Type B. These skill types can be changed as needed.