Can you paste the error here, please? Really sorry this happened
Ahhhh I'm sorry I already reinstalled it to steam and i think the proton pathway is gone so I can't copy it. It's ok! Really not a huge deal cause the puzzles are randomized and I love picross (especially speeding through them) so replaying won't be a big problem.
Thanks for the tip on the save data though! And truly the game is a blast and extremely easy to play! Fortunately all the custom steam deck controls saved so getting right back in was very easy. I'll be a bit more careful when starting the game from now on lol 🙃