Honestly, with because of obsessed this community is with QR codes, this makes a great game.
I think that it also was a really smart decision to make the QR codes lead to Google Searches or Wikipedia instead of to a specific game as this lets the game "last longer" in terms of images not being deleted and this depends more on the lifespan of Google and Wikipedia.
I think the small detail with the A button is pretty funny. Unfortunately I did have to do a little more work to get that QR code to work because of it being so small but it was still worth it.
The knocking on the door is really well done and somehow I was just immersed into the game. The randomized houses were also really great as well. This is just a great experience that I could see myself enjoying over and over again.
The only additions that I could see that could be added to this game is the ability to see how many QR codes have been collected and to be able to have a gallery so that the player could go back to each one and see what they have. Also for the gallery it would be nice to have a link that could be typed in or even just know where you are going.
This is a really well polished experience and I really enjoyed this, thank you!