13-second looping low-poly rooster run-and-crash 3D animation

GOAL: Build "Rooster Run" — a single self-contained HTML file (inline JS/CSS): a 13-second looping real-time 3D animation of a low-poly rooster sprinting through a farmyard on the edge of the desert, flapping over hurdles and swerving around obstacles, filmed like an endless-runner game from behind and to the side; at the end it lands on a garden rake, the handle smacks it in the face and it crashes in an epic explosion of feathers. No text or UI on screen, only the scene. Keep the code compact: under about 1,200 lines. MOTION: TECH three.js r160 as an ES module from https://t.co/jyIKTZ8jhL (no addons, no models, no textures). If WebGL is unavailable, show a short message. STYLE Clean stylized low-poly 3D: flat-shaded matte faceted surfaces, sRGB output, no tone mapping, soft shadows from a warm sun that follows the rooster. Palette: sky gradient `#8cc8ef` → `#cfe6f2` → horizon `#f4dcb2` with matching fog; HemisphereLight `#dff0ff` / `#e2b277` at 1.25; sun `#fff0d4` at 2.1; sand and dirt `#efd3a2`, `#e3bd86`, `#f5e0b8`; mesas `#d99a68`; rocks `#b48a66`; cacti `#5c9a4b`; wood `#9a7a5c`; hay `#d8ae63`; dust `#f2dfba`; stars `#ffd23d`. THE ROOSTER A cartoonish low-poly rooster with slightly exaggerated proportions so it reads clearly: a plump body, a slightly big head with a bright red comb and wattles, a short yellow beak, small dark eyes with a white glint, wings that can open wide, a big arching tail of glossy dark green, blue and copper feathers, long yellow legs with spurs and three-toed feet. Mostly copper-orange and dark red plumage with a golden neck ruff. Build and style it however you like. Run: fast short steps, the head bobbing forward and back, the body jiggling, the tail bouncing, small dust puffs at every step. Jumps: every hurdle is ONE flapping hop: it crouches, springs up and flaps its wings hard and fast the whole time it is in the air (wide open wings, feathers spread), the tail fanned, then lands and runs on. No double hops. A few small feathers drift off at each jump. FARMYARD TRACK (scaled to the rooster) A narrow dirt track with gentle curves through a farmyard on the edge of the desert: a low wooden rail fence along the sides, a red barn and a water tower in the background, dunes, mesas and cacti beyond. Obstacles sized for a rooster, not in a row, alternating sides: low wooden planks, hay bales, an upturned bucket and a flower pot it flaps over; corn cobs, pebbles, a tin can, an egg basket and a small cone it swerves around (leaning into turns). Near the end the biggest hurdle: a tall hay bale stack. STORY 0–10 s: sprints and speeds up a little, flaps over every hurdle and swerves around the other obstacles. About 5 s: a chick crosses the track and the rooster swerves around it. 10.0 s: it flaps over the tall hay bale stack proudly, chest out, and lands right on the teeth of a garden rake lying on the track. 10.3 s: the rake handle swings up and smacks it right in the face. Slow motion for about 1 s, camera shake: a big burs