Thank you for making this.
I already beat the game and I would like to start a new game, but I do not want to lose my deck. :(
Is there any plan to make more than one save?
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Even though there's only one save slot, you can manually back-up your save files and then start a new one if you want! The save file is named "data.sav" and it's located in C:\Users\(YOUR NAME)\AppData\Local\PocketCrystalLeague.
Simply rename it to something else and you'll be able to play a new game. When you want to go back to it, just name it back to "data.sav".