Hi Mike!
Nice French! And thanks a lot for your kind words!
I’m happy if GrimRogue works well with other things and that you found a fun way to play.
About the questions: to be honest, I have thought GrimRogue to be a deadliest Roguelike kind of Dungeon Crawler, so it’s not that often when your character leaves the dungeon in one piece. That’s also why there’s no money in the game and why it is not balanced for a long term campaign.
As usual with my games, feel free to make up or change any rules that’ll help you have more fun with it, tweaking the stats to make your character last longer, or creating other rules for the in-between session.
So to answer your first question, you can imagine that your character will go to an inn to sleep and restore all of its HP. In terms of Torches and Rations, it depends. If you want something harder, you can go with only what’s left from your previous session ; if you want a standard run: reset your torches and rations to 5 ; and if you want something easy: add 5 rations and torches to what’s left from your previous session.
For the poison status, as the previous answer states, you can imagine that your character goes to an herbalist or anything else to be cured, otherwise the next-run will be pretty harsh I guess.
Considering the backtracking, it depends if you have fun doing that or not.
At the moment, I don’t have plans for a new bigger GrimRogue edition, but it’s clear that there’s a lot that can be done for extending the game, but it will be a pretty different one as it will need to be balanced differently. Of course, I originally thought of the game on 2 sheets of paper (because heavy minimalism helps me a lot for finishing my projects), so I didn’t have all the space I wanted to write more rules.
Otherwise, I love your idea of XP as gold! You can definitely do that with the rules you’ve explained at the end, it’ll suit the game!
Thanks again for playing my lil’ game and for your questions, have fun!