I managed to leave the endless city. Now I leave in the wilderness, looking for something to do.
Oh and by the way — you can press the apostrophe key (') to switch camera angles and actually see the sailfish. And the minus key (-) toggles free camera mode. So you can watch yourself walk around in the wilderness. Not that it gives you something to do... but at least you can see the fish.
Same Discord if you want to mess around with more hidden stuff: https://discord.gg/eKzfmrgU5B