Nevermind, I'm stupid. The game does the save transfer automatically. Why I thought commenting this before trying it out is beyond me. Love the game btw! It honestly feels like Nintendo quality stuff!
Congratulations! Also- don't worry, I should've made a note somewhere regarding save data transfer! It automatically pulls the save data from the same location (which by the way, is Users/[YourPCName]/AppData/LocalLow/Joe Ryan (Bunnynaut) just in case you'd ever want to delete it personally)
Thanks! And that's really cool you were able to do that. I don't know if that's a common thing with itch games, but it's definitely the first time I've seen it work so flawlessly like that.