DEMO UPDATED v0.4 - Bone Castle

Main:
- add bone castle stage section in SUB. The bone castle section include 3 new chain stage and 1 merchant stage where player can buy item
- add water with stage in SUB
- add 3 new summon program relate to bone castle section
- reduce other stage level requirement

Misc:
- UI recolor and adjust
- Change slime SFX

Bug fixed:
- Fix bug that stage reward credit not grant