No worries, I went back through the previous jam and found this: https://itch.io/jam/20-second-game-jam-2024/topic/4276114/can-there-be-multiple-...
We discourage progression between games/levels because it stops being a 20 second game and becomes something much longer
I would interpret this to mean that the entire game experience is meant to be contained in those 20 seconds and that a longer multi-level game would be outside the spirit of the jam. But likely not disqualified.