Preserve money spent at the Wooden Nickel when reloading a save

[JeffAdriaanse]

The player can exit the game at the Wooden Nickel after spinning the stat wheel or playing the cup game and reload their save to attempt the purchase again. This can be exploited if the player reloads their save in attempt to get better results. Admittedly, the exploit is tedious; the player has to clear the boss encounter each time they want to reenter the Wooden Nickel.

[JeffAdriaanse]

Save functionality has been added for the Wooden Nickel. The game now saves upon entering the Wooden Nickel and after each purchase. Character stats, coins, and collectibles will persist when reloading the save, as well as the current shop inventory.