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2026 3D browser game Split-screen Vibe-coded

Paardenrace

Two-player split-screen race on a desert track: player 1 (Donder, purple) in 4th crossing the finish line under a red FINISH banner next to a packed grandstand, player 2 (Stroopwafel, blue) in 3rd crashing into a hedge with the hint 'OOF! Jump with R-SHIFT'. A shared mini-map of the looping track sits in the middle.
The race start: a big green 'GO!' as four horses with jockeys (Hagelslag, Pepernoot, Drop and the player) leave the checkered line under the FINISH banner, with a windmill, hay bales, low-poly trees and a colourful crowd in the stands.
Mid-race chaos: rain clouds hover over rival horses with the message 'Rained on Karamel!', a white bunny hops on the track, and the player's bunny item waits in the item slot bottom-left.

What it is

Paardenrace ("horse race") is a vibe-coded 3D browser game: a kart racer, but with horses. It takes its cues from Mario Kart and the old DOS classic Wacky Wheels: three laps around a looping track, a pack of computer riders with names like Hagelslag, Pepernoot, Drop and Karamel, and a lot of silly items to mess with each other.

You ride solo, or two players share one keyboard in split-screen, each with their own view, place, lap timer and item slots, and a shared mini-map in the middle. It also runs on phones and tablets with touch controls.

Bunnies, hedgehogs and rain clouds

Instead of shells and bananas you pick up bunnies, hedgehogs and rain clouds to throw forward or back at your rivals. There are hurdles and hedges across the track that you have to jump (miss one and you get an "OOF!"), a grandstand full of cheering spectators, a windmill, hay bales and a few different tracks and times of day, from green meadow to sunset desert.

Sonnet vs Opus

I built it twice from the same idea to compare models: one version with Claude Sonnet 5.5 and one with Claude Opus 5.5. Both turned out impressive for what is essentially a few evenings of prompting, but all in all the Opus 5.5 version was the better game: it felt more polished, more complete and more fun to play. That is the version linked below and shown in the screenshots.

How it's made

Plain JavaScript on top of Three.js, no game engine, no build step. The horses, riders, track and scenery are all low-poly geometry built in code, with music and sound effects, a menu to pick riders and tracks, and on-screen controls for touch devices.