I went to moonside town, and back to Runko just to do stuffs I missed, then it fixed itself. Sorry I'm not really helping.
How can I get a sandwhich for the dead end cave?
After entering the building with purple and the screen went red, I can walk through walls but cannot change location through the stairs (I walked through it instead). After the scene at the top, I can't get out of the building because of this.