Thank you for playing!
It was a bit of a pain to recreate but I did enjoyed it when it worked.
2nd level's performance was an issue I noticed in the editor as well. There was just too much to render there.
As for the bug, if you are talking about the portal, It is supposed to be locked though and not simulate any physics. I am not sure how it still enables movement when i explicitly disable it, I apologize for that.