Sorry for reupload, but it turns out QR code wasn't readable for everybody (thanks for pointing this out @Shroomir). So, here you have it. Can you report please, if this one doesn't work either? I would appreciate it.
@magnumroland Your comment is the best thing I heard today, you made me smile If my level is too intimidating, but you want to see how to complete it, you can always watch video of solution above.
@BioRenegat Haven't played yet, but just wanted to mention that the QR code should always be scannable by everyone, and if not, it probably isn't your fault. Every device can zoom into the QR code and take a screenshot, which is what I do every time.