Hey, so all save data is stored locally on your own device. It never leaves your machine. I don't have access to anyone's save files, world state, inventory, or any other kind of game data. The only thing that goes to a server is leaderboard scores, if you choose to send your score.
Where exactly the save game data lives depends on how you're playing. E.g., for web or Windows:
If web (browser): In your browser's localStorage - it's tied to that specific browser. Clearing browser data will delete it. If Windows (desktop app): In your AppData folder, something like C:\Users\YourName\AppData\Roaming\roguefort\
So basically I can't see or modify anyone's world data from my end. For the missing dungeon data issue or performance issues relating to save game data, that would need a fix in the game code itself. I've tried to do guesswork for most fixes but it appears the lag issue isn't resolving it (i.e., what's addressed in 0.3.5) yet