Marble Run Sim Cozy Marbles Rolls into Steam Next Fest with a Brand-New Demo

Build a marble marvel and create the marble run of your dreams with the brand-new playable demo for Cozy Marbles, available to download on Steam today and included as part of next week’s Steam Next Fest.

Roll into the nostalgic world of marble run building with freeform construction tools and your own toybox of track pieces. Place loops, twists, and drops to build awe-inspiring courses and intricate tracks, before rolling your marbles off on their adventure.

Ease in with the tutorial, take on challenges, and use a selection of big, small, and wacky pieces to fit together the marble course you’ve always wanted to roll with.

In the full game, launching later this year on Steam, build your marble runs across a range of themed environments, including a mesmerising Space Station perfect for high-tech portals and laser tunnels, and a Fairytale Tavern, an idyllic backdrop for castle coasters or an intricate forest labyrinth.

Customise your marbles with a huge range of colours, facial expressions, stylish hats, and silly little arms. Relax and unwind with a lo-fi soundtrack as you create marble masterpieces to share with the world, importing courses from other builders and exporting your own creations to share with others.

10. Juni 2026, von Thore Varga