Please do not upload edited cards. Editing can distort the QR code. Only upload original screenshots, in PNG format and using portrait mode. You can also use the share button to get a good size card. Just use "save image" before uploading. Additionally, always post the checkmarked version as your main image, to prove that a level is playable. And please remember to clean up after yourself by deleting duplicates to keep the database tidy. Thanks.