Fans of classic marble run toys can get an early look at Cozy Marbles thanks to a brand-new playable demo now available on Steam. The upcoming marble run construction simulator will also be featured during Steam Next Fest, giving players the chance to experiment with its creative building tools before the full release later this year.
Cozy Marbles invites players into a relaxing sandbox environment centered around designing and building elaborate marble courses. Using a variety of track pieces, players can create everything from simple rolling paths to sprawling contraptions filled with loops, twists, drops, and unexpected turns. The game’s freeform construction system encourages experimentation, allowing builders to bring their dream marble runs to life using a wide assortment of track components.
The newly released demo introduces players to the fundamentals through an accessible tutorial while also offering challenges that showcase the game’s building possibilities. Whether creating compact designs or larger, more complex tracks, players can mix and match standard and unconventional pieces to produce unique marble adventures.
When the full game launches later in 2026, players will be able to build their creations across several themed environments. Among the locations revealed so far are a futuristic Space Station filled with opportunities for laser tunnels and high-tech portal systems, as well as a charming Fairytale Tavern setting where players can construct castle-inspired tracks and winding forest-themed courses.
Customization also plays a major role in the experience. Players will be able to personalize their marbles with a wide range of colors, facial expressions, hats, and even quirky little arms, giving each marble its own unique personality as it travels through custom-built courses.
Designed as a relaxing creative experience, Cozy Marbles pairs its construction gameplay with a calming lo-fi soundtrack that encourages players to take their time and enjoy the building process. The game will also feature community sharing tools, allowing players to import creations made by others and export their own marble masterpieces for the world to enjoy.
With its combination of creativity, customization, and stress-free gameplay, Cozy Marbles looks poised to offer a nostalgic and charming sandbox experience when it arrives on Steam later this year. In the meantime, players can jump into the newly released demo and start building their own marble-filled creations today.