植えて育てて道を敷く、ローポリ惑星のガーデニングゲーム（Three.js）

Build a mobile-friendly 3D gardening game in Three.js that runs in the browser. The world is a small low-poly planet with green hills, rocky grey patches, pink and green trees and blue lakes. A chibi character walks around the curved surface with a virtual joystick while a third-person camera follows and tilts with the terrain. A bottom toolbar lets the player pick Tree, Flower, Path, Fence and Stones, and a large context button changes between Sow, Harvest, Water, Tend and Pave depending on what is underneath. Show a ring marker on the targeted spot, resource counters at the top and a small quest card such as laying a number of paving stones with a progress bar. Use soft lighting, a bright sky, gentle splash rings when walking in water and short toast messages after actions. Done means a player can plant, tend, harvest and pave on the planet and complete the first quest.