2020.2.1 updated contents:
1. Change skill ICONS.
2. Fixed 4 option 2 balomir skill description!
3. Corrected the use conditions of the blanking gun (proficiency 60 reduced to 42).
4. Fixed a bug that prompted level 1, level 2 to fail 60 rounds...
5. Fixed a treasure chest BUG in chapter 4 that now only allowed one angel to be acquired.
6. Modified the experience acquisition level difference, now the experience acquisition level difference is more than 5 levels to get "0".