The colors are used to select the markers color. The tilted gray rectangle is the eraser tool. Using the adjust tool will change brush size, default: 20. Clearing will ask before effecting, and splatter and drip buttons control the effects of the marker/brush. Move your mouse at medium speed, too fast will make too straight lines, too slow will make too many drip and splatter effects. Hope you enjoy! -@sonicxspriter
Coding and art done by @sonicxspriter.