Stuck? In what way: Did only the sword disappear? Did you respawn in a wall? If you can tell me what happened I'll try to fix the bug. edit: Oof, don't know how that happened, it'll be fixed in a few minutes.
My character fell down the first hole with the sword, when it respawned the sword did not come back and revisiting the old man didn't grant me a new one either. I managed to drop it again and the same thing happened. In browser and the downloaded .exe if that helps.