Make a small arcade vertical shooter game in one web page: a cat pilot in a paper biplane fighting origami warships above a sunset sea. Arrow keys move, space fires. All the art must come from the image model selected for this run: sprite sheets for the hero (idle, bank left, bank right, hit), 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. · 4