No problem.
As you probably know, save files are usually a list of values that represent game information (level, money, have you visited this place yet, etc).
Mine is no different, it just happens to be compressed, because due to browser limitations you only have 5MBs of data across all itch.io to be saved in this way, and I want to occupy as little as possible of that storage.
I hope that clears out the confusion.
If you have any other doubts or questions you are welcome to contact me.