seems that the serpent boss also isn't showing up for me? I just get a fish and nothing happens on the final square
You need to fish 3 times to get the portal to open, or for the serpent boss to show up. I need to put the sparkle indicator back up for each fishing attempt to let players know to keep it up. Pushing 0 to move fast was a debugging/testing tool that I must have forgot to disable. That swallowing glitch is probably a matter of overlapping stuff happening which I need to disable. Thanks for letting me know about these issues.