浮島を駆けるThree.js製3Dプラットフォーマー、帽子投げ付き

Build a 3D platformer level in the spirit of a classic plumber adventure, as a browser game using Three.js, Rapier physics and WebAudio. Create a set of floating grassy islands in a bright blue sea, with palm trees, flowers, stone steps, a red balloon airship at the start and a stone arch with a flag at the end. The player is a small hero with a red cap who runs, jumps and throws the cap as a returning projectile. Include 8 platforms, 3 collectible moons, coins, walking enemies, checkpoints, a hearts display, a timer and short on-screen hints. Make all models procedural from primitives, add original synthesized music and sound effects, and support keyboard and touch controls. Use a cheerful, saturated cartoon palette. Done means the level can be finished from start to the completion banner without falling, with stable physics.