Build a fantasy MMO

Build a playable 3D fantasy MMORPG-style game in the spirit of a classic early-2000s MMO, using original names and assets only (no trademarked names, characters, or assets from any existing game).

Deliver a single self-contained index.html. You may load Three.js from a CDN; every other asset, script, and style must be inline in the file.

Requirements:
- Third-person hero character on a stylized low-poly fantasy terrain: rolling hills, trees, and a small village.
- WASD movement with mouse-orbit camera.
- At least three roaming enemy creatures with simple AI that the hero can fight (attack on click or key press; visible health bars for hero and enemies).
- XP bar and at least one level-up.
- One quest given by a village NPC ("slay three beasts"-style), with on-screen progress tracking and a completion reward.
- Day/night cycle lighting.
- On-screen HUD: health, XP, quest tracker.
- Runs at interactive framerate in a desktop browser.

One shot: your first complete response is the artifact.