Hi there !
I tried the demo this morning. Loved it so mush I bought the game right after ! My first paid playdate game :)
But I have a weird issue : After downloading the full game, I sideloaded on the play.date website but it was still the demo... It shows the demon icon on the website (weirdest thing) and on my playdate too. I uninstall the demo, the full game, double checked the file I downloaded from itch.io (it was the right one) and the one I sideloaded on the website. When I loaded it on the Playdate simulator on my computer, it's the full game all right.
The solution was to deleted the demo data (via usb data-disk plug). Maybe it could be nice to have the demo's and full game's folders named differently ?
Anyway, nice work on this game ! Can't wait to play more !