Create marvellous marble runs and let the good times roll with the brand-new Cozy Marbles playtest, available to download on Steam today. 

Available to play until May 18th, roll into the creative world of marble run building with an early look at this playful, physics-based sim. Create imaginative courses filled with loops, twists, and drops, build high-speed races full of boosters and ramps, and watch your marbles flow through carefully laid routes all the way to the finish line, or fly way off track!

Use a selection of big, small, and wacky pieces to build intricate tracks and fit together the marble course you’ve always dreamed of. Dive into the ins and outs of marble run building with the in-game tutorial and five unique challenges, before rolling your marbles off for a sunlit adventure across your virtual living room.

Want to livestream your marble masterpieces? Full Twitch integration built directly into today’s playtest lets viewers add additional marbles to your races via chat for total marble mania.

Developed by Pixel Pea Games and published by Mythwright, Cozy Marbles rolls out on Steam later in 2026 with an array of locations, track pieces, challenges, and customization to build the ultimate marble runs.

Check out the trailer below and then tell us what you think on our Bluesky and Twitter.