I believe that there is a lot of hard parts to creating work like Justin Maller. For example, getting all of the shapes to fit perfectly next to each other with out gaps. Another example is the Gradients. It was frustrating for me to figure out how to change the colors for every shape. And lastly the hardest part for me was the bordering around the shape. I had to go back to every single shape and change the outline from 1 to 0.