Click the different colors to change the pen color. Click the eyes to change them. Hold and drag to color. Drag the items on the right. Click to change the color of all drag and drop items. Click the blue boxes on the bottom to generate a name, or use (up, down) arrow keys to navigate through the prefixes and (left, right) arrow keys to navigate through the suffixes
Thanks to @FunWarriorcats for the original project, and just to let them know, I changed a few colours so not everything is the same :)