On this coloring page, we can see a creeper from Minecraft. Its body is a vibrant green which contrasts against the opposite, dark square head. Its face is almost expressionless and is linked to the menacing reputation it carries in the game. It is a hostile mob which will self-detonate when it is close to the player.
To create a detailed and realistic image of the creeper, I would give it shading and a subtle gradient of colors, fading darker near its head. I would use darker tones of green to accent certain areas of the body, taking care to blend the colors together. I would also add some texture and shadows to emphasize the creeper's 3D characteristics. Finally, I would also give it a slight yellow glow to represent the explosion it produces.