Hi and welcome to the forum. Unfortunately your QR code can't be scanned. For a better card image, use the Share/Export button located here in Mekorama. You can find more helpful hints on making and sharing levels on the Forum by reading the documents the mods have put together here: https://mekoramaforum.com/threads/everything-you-have-always-wanted-to-know-about-mekorama.287/
