Ah, thank you very much. I have fixed the bugs you mentioned about being able to get through to the backrooms of the inn, as well as being able to walk inside the walls of Lilith's home. These fixes will come in the next update which will be a little later this month.
I can't seem to replicate the bug you mentioned about being able to go inside the bathroom walls. I also cannot replicate the bug you mentioned about being able to get the scenes with the prefects gossiping after the quest is complete. I know that you can still get them even after finding out Tina is the culprit, but once you get the "quest complete" message from crystal, these scenes should no longer be able to be triggered.
When the next update is out, I will be sure to thank you in the patch notes for the bugs you reported :)