Nice use of perspective. You'll get better QR code results if you use the Export feature rather than taking a screen shot. It's the connected 3-circle button seen in the bar at the bottom visible in the screenshot.
@Gabexus - no that wouldn't be allowed. Stefanovime meant that you could still use the screenshot, but crop it so that only the whole card would show and not the background and other parts of your screen. But this wouldn't improve the quality of the QR code unless you also enlarged the card after cropping it. I personally think that that would be too much work. There is nothing wrong with your screenshot upload as is, but some people (like @Don G Rowe and I) prefer to see the exported version of the card as it has a cleaner look. It also results in a higher resolution which makes the QR code easier to scan. There is one advantage to using the screenshot version and that is to show the checkmark proving that the level can be completed. We trust, however, that all levels uploaded can be completed meaning that showing the checkmark is rather redundant. To export just the card, like mentioned, all you have to do is tap on the export/share icon in the bottom right of your screen. Either way is acceptable as long as the card itself is not photoshoped or altered. Thanks!
Good use of perspective. I tapped several times with, obviously, no result before I thought to turn the screen. Cool!