Hint: Once you have created your tile AND added it to your cart, you may start another tile. When you open the editor, your first image will still be there. Don't worry. As long as you have added the first image to your cart, you may delete that image and create another one.
The following video will show you how to Build Your Own MixPix tile.
Note: It is recommended to build your MixPix on a desktop, laptop or large tablet. The experience on a phone may be less satisfactory.