If going left from the goo hallway leads to a dead end, something might be bugged. There isn't really another way I can explain it, if it's working correctly, it should be very obvious. Could you send me your save file and your "global.rpgsave" file from your save folder? That way i can check on my end and see if something is bugged. You can send me a download link on here, but if you joined on Patreon and joined the discord, you could also send it to me on there without needing to upload the file to another website.