You've made something that's beautiful to look at. Very nice warm and fuzzy style.
Sadly the gameplay didn't quite work out so well for me. The character felt way too slow and the absense of any sound only highlighted how boring the waiting time between walking from place to place was.
Finding the key under the doormat felt sort of unnecessary since there were pretty much no hints at it and it turned into quite the tedious pixel hunt that almost made me give up. It's kind of funny because if I read the dialogue correctly, it seems like you're well aware of this and still put it in haha.
I think that's sort of unfortunate because at the heart of your game lies a really quite fascinating interpretation of the theme - that the systems of gambling are intentionally broken for players so the gambling companies can cash in on their addiction. Really interesting take here! It's just kind of hindered by the things I've mentioned above, in my opinion.
Not trying to shoot you down or anything. I just hope that this feedback can help you with your future projects :)