v0.0.6A New Area + Progression Polishing

v0.0.6A Changelog:

- Added new area: Winter Forest (Unlocks at level 30)

- Added 3 new slimes that spawn only in the Winter Forest (more to come)

- Increased amount of XP dropped by all slimes

- Fixed a bug where multiple of the same hero could be spawned

- Fixed a bug where multiple music tracks were played simultaneously

- Changed hero spawning to always spawn in the screen boundaries

- Added a loading screen when starting game

- Multiple minor bug fixes and gameplay enhancements

Known issue: Rarely, hiring heroes will not update coins correctly. I am working to get this fixed.

Upcoming: Ability Packs, tutorial rework,

Note: Final balance changes are included in this update, a game reset is recommended to avoid incorrect progression