$1936

Make the option to save a work in progress. I had to leave my pattern mid completion and when i came back to finish, the power was out (and so was the pattern). Adding the option to save an unfinished pattern and finish it later would be awesome.

Bonus : Make the right click to cancel the colors and keeping the left click pressed, to keep posting the color without the need to release and click every pixel.

I have more suggestions but these for start since are the most important.

Good idea! Id live these features!