Retro Pixel Platformer Build Chain

Build a retro pixel platformer with one connected Codex prompt. Pick the world theme, studio name, hero and color mood; the prompt keeps 3 worlds x 4 levels, bosses, wall jumps, dash and ground pound unlocks, hidden gems, bonus levels and time-trial ghosts defined. Ordered stages share one manifest through engine, player feel, enemies, juice, saves, an F2 level editor and replay tests. Result: an offline browser game in one HTML file plus editable source.