V2.1 Updates

Added achievement system.
Adjusted Artefacts CD to Artefacts Charging.
Added Artefacts Charging bar below Artefact Slot position.
Artefacts will be charged when using Normal Attacks, Battle Skills, Dash Skills.
Removed the privious UI display of Artefacts CD and charging points.
Added customized skills selection in the The Animitta and Training Ground.
Customized skills could be taken into challenges.
Upgraded all Normal Attacks, Battle Skills and Dash Skills by one level, each of them will be four levels.
Modified enchanting of all Normal Attacks, Battle Skills and Dash Skills to adjust the attack power.
Polished the action card description.
Lowered item prices to 100/200/400.
Lowered the selling price of skills to 80.
Moved "Weapon selection" to "Weapon Appearance", including the small text in the interface instead of "Weapon Select".
Increased the basic attack value of Normal Attacks, Battle Skills and Dash Skills.
Modified the basic values Normal Attacks, Battle Skills and Dash Skills to balance the game.
Added swaps artifact slots in the pause menu.
After boss battles,you will not only obtain HP potions by the goddness statues that have already been consumed, but also recover 30% HP.
Entering the first level of the challenges you will get an additional Artefacts selection.
Adjusted the gems color of trap statue in Chapter 1.
Introduced key binding.
Deleted the artifact that increases the action speed.
Modified the way holy relics charge Artefacts.
Modified the rule that items refreshing in the shops.
Some monsters add the Warning line for attacks.
Modify the transition attacks of the third boss.