Make a small arcade platformer game in one web page: a raccoon courier leaping across rainy neon rooftops, dodging security drones. Arrow keys move and jump, space attacks. All the art must come from the image model selected for this run: sprite sheets for the hero (idle, run, jump, attack), three enemies and a boss, plus a background. Cut the sheets into frames and animate them in the game. Do not draw characters in code. Add a HUD, a score, and win and game over screens. It should feel fun the moment it loads.