[Balance]
• Added Deathtide difficulty
• Tweaked the difficulty of Nightmare and Normal

[Rewards / Gameplay Loop]
• Increased the drop chance of souls
• Now bosses will drop souls and gold after being defeated.

[Item Shop]
• Now the item shop sells equipment for gold
• Increased the amount of keys sold by the shop

[Bugfix]
• A few small bug fixes

P.S: Work has started towards adding an endless mode that will seamlessly start after the player kills the final boss. It's not ready yet because it needs a few balancing passes.