This is a major update, with more content in the full version (early access version), better UI, better save system with characters and generally a better flow through the game and menues.
The Sunken Temple is a new story with 12 new enemies, whereof 3 bosses and one story boss. It also includes a new card class, Reptiles, with 12 new cards with 4 level variations, new mechanics and effects.
5 new duel opponents are to be found in the attic of the tavern.

Enjoy!