Publisher Mythwright and developer Pixel Pea Games announced Cozy Marbles, a comfy new marble toy building sim game.

Cozy Marbles is in development for Windows PC (via Steam) with a release set for sometime in 2026. A playtest is available now.

“Cozy Marbles is a little game for big imaginations,” said Stuart Morton, Publishing Director at Mythwright. “From creating viral marble runs to classic marble races, Cozy Marbles gives players the tools to build any course they can dream of in a wonderful world of marbles. We’re very much looking forward to players rolling into Cozy Marbles with today’s Playtest, and can’t wait to share more on this marbelous new game as we get closer to launch.”

Here’s a rundown on the game, plus its reveal trailer:

Cozy Marbles is a comfy game about building marble runs on a sunny afternoon. Using a huge range of bits and pieces, fit together the marble course you’ve always wanted to build and play with. Unwind to a lo-fi ASMR soundscape and roll with the nostalgia.

Features

• Enjoy Your Own Massive Toybox – Tinker with freeform construction tools and a rich library of parts. Design awesome loops, twists and drops, then roll your marbles off on their adventure. Take “playing with marbles” to a whole new level by guiding them across complex courses, bouncing them over obstacles with boosters and ramps, and even shooting them from cannons.
• Customize Your Marble Marvel – Build your marble run from wood, metal or plastic, choose its colors and give it a name. Customize your cosy marbles with a range of colors, facial expressions, stylish hats and silly little arms that flail while rolling.
• Mess Around and Find Out – Cozy Marbles is a little game with a big brain. Plan and experiment with all sorts of marble constructs, from marble rollercoasters to wacky apparatus. Watch your marbles flow through carefully laid routes… or fly way off track!
• Set Up Marble Races – Assemble a marble course, place its finish line, and drop your marbles to watch them race to the end. May the best marble win.
• Share the Joy – The best next step after perfecting your marble masterpiece (or grotesque marble trap) is to share it with the world. Export and import courses to show off your build and try everyone else’s.
• We think you’ll love Cozy Marbles if you enjoy – Marbles on Stream, Marble World, Tiny Glade, Satisfactory, House Flipper 2, Small Spaces, PowerWash Simulator 2, Islands & Trains, Tiny Book Shop, Supermarket Simulator, Sticky Business, A Little To The Left, Rollercoaster Tycoon.