🌈🚀 SP13KTRA

Full Spectrum Racing.

Race eight anti-gravity craft across eight spectral circuits in real 3D. Every circuit has its own colour, theme, and procedural soundtrack.

Created by Frank Force for JS13k 2026

🌈 ▶ Play SP13KTRA

🎶 SP13KTRA Music Bench

💿 SP13KTRA for Dreamcast

🎬 Watch the trailer

🕹️ Controls

• Accelerate = Mouse Left, Up or W
• Steer = Mouse, Left/Right or A/D
• Turbo = Mouse Right or Left Shift
• Brake = Mouse Middle or Space
• Music on/off = M

In the menu, click a circuit to pick it, click it again to race, and click TEAM to change craft.

🏁 How to Play

Finish a race to unlock the next circuit. Explode and you race it again.

• You have one energy meter: the turbo drains it, rainbow strips refill it, and walls and crashes cost it. At zero you explode.
• Yellow pads boost you. Pulsing arrows point around turns.
• White dashed shoulders are rough and slow you down, unless you turbo over them.
• Let go of the gas to turn harder.

🦄 Features

• Eight circuits and eight rival craft, one colour of the spectrum each.
• WebGL 3D rendering, lighting and fog, all generated from code.
• Procedural music, every circuit's techno loop is composed from a seed and baked on the fly.
• Canyons of towers, arch tunnels, banked bowls and a figure eight that crosses itself.
• Suns, eclipses, stars and clouds, with a different sky on every circuit.
• Boost pads, recharge strips, rough shoulders and rivals that race back.
• A live minimap of the real circuit with every racer on it.
• Your best placing and best time saved for every circuit.

⬜🟥🟧🟨🟩🟦🟪⬛

WHITE UNICORN. 🦄

Drink the spectrum.

⬜🟥🟧🟨🟩🟦🟪⬛