HI Rez!
Thank you for this question!
My vision for the P2D was always a one-shot based game! You choose 2 delvers from the pool that exists and venture into the dungeon! At the moment, there are only four to choose from, but this number will increase in the near future :)
If you wish to create delvers that "level up" and a dungeon with various levels, you have my blessing! Looks like an interesting idea!
And I want to thank you again for making part of the jam and asking this question, hope I clarified what was bugging you!
This is my first jam so far and it's been an awesome experience, good luck, and happy creations Rez!