The idea of painting on wet paper with no undo is a good one, and having a commission to hit gives it a goal. Right now it looks a lot like a basic paint program, though. If the water and pigment spreading were easier to see, the simulation underneath would come through more. A little polish on the screens and the itch page would go a long way too. When a painting scored low, I wasn’t sure why, so a line on the result card telling you what to fix would help.
Honestly tho, a lot of it is just me. I am not a patient painting type guy!!! I scribble and scream! I tried not to hold my shortcomings against ya!