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…