animated characters, Cuphead and Mugman, two-player mode, cooperative gameplay, vintage cartoon style, exaggerated expressions, running, shooting, jumping, 1930s animation aesthetic, bold outlines, vibrant colors, dynamic poses, side-scrolling action, forest background, boss battle, retro game design, textured rubber hose limbs, inkwell island, whimsical, high-energy, soft lighting, clear foreground, detailed environment, action-packed, split-screen view, colorful projectiles, whimsical enemies, health meters visible, power-ups, collectible coins, 2D platform.