Thank you for such a detailed feedback!
I'll make sure to fix all the bugs and the issues with game flow for the full version. I'm not sure what's wrong with the hamster though, it' the first time I hear about that issue. Do you mean the paper is blank, or it's not visible when you're looking for it?
Also, the prank doesn't work because only some of the objects should be used. When asking around about what Mrs. Wilson is afraid of, some characters tell lies. The idea was to observe who always lies, and who says only part of the truth during the dialogs, and then choose the right objects based on that. All the hints were really subtle though. I'll definitely change that part as well, since it's just confusing at the moment.
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Thanks for the hint, I played through it again, I'm glad I saw this ending, but I still had trouble telling who was lying and who wasn't, and ultimately I'm not sure why this particular combination was the correct one. As for the problem with the hamster, I meant that you can't see it the hallway and only when I take it to my inventory by clicking on the painting, I don't know if it was supposed to be that way.