Hi Scott,
I found a bug about Book's revert feature.
- Open the Demon Castle project. - Go to third page. - Drag the key and show the door. - Press "Revert the page" button. - The screen is reverted but never works again.
Also 4th page doesn't work (explanation of right buton). I guess someone saved the project after use "Revert the page" at 4th page.
Cheers, - Takashi