Solo developer Pixel Pea Games and publisher Mythwright have announced that Cozy Marbles, a relaxing physics-based marble-run building sim, will launch on Steam on August 20, 2026. Revealed at last night’s Secret Sauce Showcase, the game invites you to engineer showstopping courses filled with spirals, twists, and drops in a world of cozy creativity — and, in a nod to those mesmerizing viral marble-machine videos, to make music by rolling your marbles across xylophone blocks.
It’s a nostalgic, low-stakes sandbox built around the simple joy of watching a marble complete a course you designed. Place ramps and cannons to bounce over obstacles, build portals and laser tunnels for a run of the future, drop in boosters for a high-speed sprint to the finish, and float your marbles through anti-gravity fields — all while a relaxing lo-fi soundtrack keeps the whole thing calm and cozy.
Build, Customize, Unwind
Whether you want a simple build or a complex showstopper, the choice is yours — and the game leans fully into lo-fi ASMR bliss along the way. You’ll construct runs from wood, metal, or plastic, beat challenges to unlock more intricate track pieces and new environments, and guide your marbles across increasingly elaborate courses. The pitch is refreshingly clear: release your marbles and let the good times roll.
The personality lives in the marbles themselves. You can customize your little marble marvels with a huge range of colours, facial expressions, and stylish hats, unlocking even more options as you go. It’s the kind of low-pressure creative toybox that’s easy to lose an afternoon in.
Engineer marble masterpieces in a comfy, physics-based sim — race over obstacles with boosters, ramps, and cannons, float through anti-gravity fields, and build portals and laser tunnels.
Build with wood, metal, or plastic and dress your marbles up with colours, faces, and hats. Beat challenges to unlock more customization, track pieces, and environments.
Bounce marbles over xylophone blocks to turn your run into a song — the same satisfying, musical magic behind those viral marble-machine videos.
Export your creations online, try other builders’ courses, and use Twitch integration to let Twitch Chat drop marbles directly into your race while you stream.
Three Worlds to Build In
Cozy Marbles spreads its courses across a variety of themed environments, each with its own vibe and its own bits and pieces to build with. At launch, you’ll be rolling through three distinct settings:
Pure cozy comfort — the nostalgic, homey heart of the game where the marble runs feel like childhood.
A whimsical, storybook setting full of charm and character for your most fantastical courses.
Go futuristic with portals, laser tunnels, and anti-gravity fields for a marble run of tomorrow.
A Cozy Debut With a Strong Backer
That’s a notable pairing: a first-time solo creator backed by one of the more reliable names in cozy and management publishing. Mythwright’s track record with sim and strategy titles suggests Cozy Marbles is in good hands for its launch, and the demo already being live is a good sign of confidence.
Cozy Marbles launches on Steam on August 20, 2026 for $9.99 USD / €9.99 EUR / £8.99 GBP, with a 10% launch discount. You can download the demo today, add the game to your Steam Wishlist, and follow Pixel Pea Games and Mythwright across Bluesky, X, Instagram, TikTok, and at mythwright.com for the latest updates.
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