Gravity Golf

Prompt

Build a single-file index.html canvas physics game called “Gravity Golf.” The player drags back to launch a ball across space. Planets, black holes, and moons exert realistic gravity that curves the trajectory. Show a dotted predicted-path preview for the first part of the shot. Include 15 handcrafted levels with a star rating (par shots), moving planets in later levels, wormholes, and a level-select screen with progress saved in localStorage. Add particle trails, a parallax starfield, synthesized Web Audio sound effects, and a mute button. Touch and mouse support, minimal but gorgeous cosmic art style.