The dungeon had a name: “Despise.” It had what looks like a wraparound map on the second level, a level three consisting in straight corridor of 5 steps, in which I had to cross a green pixel cascade, and a fourth level of three steps and a dead end. I suspect this end is not as dead as it looks like, but I don’t know what to do there. Searching did nothing, I may have to use an object but I don’t know which, so back to the overworld. Besides, I’m now starving, I completely depleted the food I was given at the beginning of the game, time to refill!