The central figure is a surreal, hybrid creature featuring a kitten's head with wide, expressive eyes atop a black, multi-tentacled octopus body. The kitten wears a small, red, spiky collar and has an antenna-like projection on its head. Extending from its sides are two black, serpentine tentacles that curl upward, each ending in a monstrous head with blue eyes, sharp white teeth, and red tongues. The torso of the creature is marked with the white numeral "1" at the center.
The entire creature is set against a bold, solid orange rectangular background. Above the creature, the word "GUSTAVE" is written in large, decorative, hand-drawn lettering. The letters are stylized with intricate, ink-like textures and patterns, including scaly and wood-grain designs. The creature itself is rendered in a detailed, illustrative style with fine cross-hatching and ink-like strokes that contrast with the vibrant, flat orange field.
The overall aesthetic is whimsical yet dark, reminiscent of a surrealist storybook or an eccentric gothic illustration. The colour palette is dominated by the bright, flat orange background, which makes the stark black of the creature and the large lettering stand out prominently. Small pops of red appear in the collar and the tongues of the serpent-tentacles, creating a balanced, high-contrast composition.