古罗马像素风横版格斗游戏,战象Boss压轴

Using the Magnific MCP, build a playable pixel-art beat 'em up set in ancient Rome, as one HTML file that works on mobile. Generate a key art first and use it as style reference for every asset: stage, hero, enemies, a war-elephant boss, items. Animate the characters with image-to-video on green screen, pick the frames that loop, key out the green and keep every animation on the same scale and palette. Add touch controls, combos, shield, dodge, a throwable pilum, pickups, a 1-minute demo mode and a chiptune soundtrack. Tell me the credit cost before each generation.