I did just last night, and I like it a lot. Nearly drove me crazy near the beginning, as I made my first steps to understanding button symbols and numbers of this game, and generally adjusting my mindset to one appropriate for solving most of the secrets.
However, I found a QR code. I found it in a temple room on a wall, I scanned it, and entered it. It did nothing. I have since not used it. If the game is to be believed, I have everything including the 3 heart pieces, but there's this one thing that bothers me, and the internet doesn't appear to have answers.