Thanks so much for the comments and feedback!!
For the bug after putting the postcard together, I haven't seen that one before so I'll have to look into it...would you happen to remember which screen it happened on?
For the scrap of paper that's stuck in the window, that's supposed to appear after the player has done a certain action, and there's a glass knocking sound to let the player know it's been placed there. (Kind of like where you solve a puzzle that unlocks something in another room). I was trying to go for a sort of creepy effect where someone is in/outside the room but you can't see them. I'll be thinking about how to effectively have these effects without negatively affecting the gameplay too much.
As for the prompts that ask if you want to check something out, I fully agree with you, I definitely should have taken those out. Those buttons were there from when I was learning the Phaser framework and how mouse input worked and I just kept them there...:D
Again thank you so much for trying it out and the detailed feedback!