So, like many here, I was stuck because i didn't find the coin. I went out onto the balcony, and look around, thinking there was something to do there, and it seemed there wasn't. Walked around a while, was stuck, checked the forums, and realized i had to get a coin from the balcony (as i read that, I thought to myself, "geez, I've already checked the balcony, must have missed something").
I go back to the balcony, and look around a bit, and still don't see it, initially. Finally, I happen to see a sparkle from a bowl, and I realize it must be the coin. But, just looking at it, it looks like it's part of the decoration, and not a separate object. Only because I knew to look in that room, and I knew to look for a coin, and because I caught the sparkle (which, because it was raining, wasn't the only thing on the screen to move, which is how other games can bring attention to an object).
The only other complaint I had about the game was the load time between screens, but the coin really bothered me.
I would suggest showing the edges of the coin, and make it so it's an object separate object from the balcony bowl-thingy.
Oh, and after 10+ years of following this project, finally something tangible. My initial predictions of "never" have been partially refuted, but, there is still much left for this game before it's finished. GL on the rest of the project. Where is Say to argue with me anyway?