The paintbrush will follow the mouse. You can press the space key to change the look of the paintbrush. You can click on the rock to get a certain costume on your paintbrush. The looks are every costume in the library except Girl5-a, Girl5-b, Button1, Button2-a, Button2-b, Button3-a, or Button3-b. You can also just type the costume number. It only goes up to 295.
