Hi,
We have noted a warning in our Download link that said:
⚠️DO NOT UNINSTALL THE GAME - your save data will be deleted when you do that. There's nothing we can do if you deleted your saved data.
So, there's nothing we can do to recover your data. What lost is lost and I'd have to start over again, just like you did...
HOWEVER, in v.1.1.2 (next update, which will be up ~ tomorrow), we added a new feature to automatically recover the Exclusive Memory Artworks you got since the game released on Itch-io, along with Extra Hearts and Items based on how long you have played the game in the Guide (please make sure to play the Guide).
All the bugs in the game are fixed in v1.1.2. And you will be able to invite Da Thach, Wey, Yew, and Bardo to your room, too