Japanese crossword «Drum»

I personally paste my drawing into a new 'paint' canvas, resize it so that there are no empty lines around the edges and save it as png. Then you can upload that png file instead of the screenshot. If it shows an error and says that the image is too blurry, it means that there are too many different shades of one colour. I had it happen once when I had multiple shades of white in the 'background' of my puzzle. So, make sure you are consistent with the colours. Here's an example of one of my puzzles. Hope you figure it out :)