Minimalist Blank Space Graffiti Sketch

Graffiti sketch illustration of [a playful cat riding a skateboard], featuring quick outlining, free deformation, and an impromptu hand-drawn draft aesthetic. The linework is casual, exaggerated, varying in thickness, slightly messy yet rhythmic and expressive, emphasizing stylized spontaneity over realism. Colors are applied in rough, opaque blocks with a distinct dry-brush texture, visible brush marks, and dry-streak coverage tailored to the subject. Plain white or clean blank background with abundant negative space, accented only by a few minimal sketchbook doodles such as small arrows, circled marks, light scribbles, or casual handwritten notes without overcrowding. A subtle, elegant signature reading "voxcat" is neatly placed in a corner like an artist's mark. Strictly avoid watercolor blooming, smooth gradients, heavy paper textures, soft fog, and photorealism.