Stack Sorting

Your screen fills with rainbow cylinders, and the only thing standing between chaos and a clean stack is your next click.

There’s something deeply soothing about sorting a jumble of colored cylinders into neat, uniform towers. Stack Sorting drops you into exactly that loop: a few pegs, a bunch of rainbow tubes, and one rule that’s easy to learn and surprisingly hard to master. You click a stack to grab the top cylinder, then click another stack to drop it. You can only place a cylinder on an empty peg or on another cylinder of the exact same color. That’s it. But once you’re four moves deep and realize you’ve just buried the orange under three blues, the game quietly teaches you to think three steps ahead. The beauty is in the friction. At first it feels like a chill brain break, perfect between classes. Then the cylinder counts creep up and the pegs multiply, and suddenly you’re staring at a digital traffic jam. I kept coming back after one specific fail—I had every color perfectly grouped except a single green trapped on a peg with no empty space. The only way forward was to undo my entire sequence. That tiny gut punch is exactly why it works. There’s no timer, no score pressure, just you and your patience. What impressed me most is how tactile it feels with just a mouse. The cylinders have a slight bounce when they land, the colors are bold, and the click feedback is snappy enough to keep you in a flow state. If you like puzzle games that don’t punish you for experimenting but still make you feel clever when a stack clicks into place, this one’s a keeper. I wouldn’t call it easy—some later layouts get genuinely knotty—but it’s the good kind of stuck.

Use a mouse or touchpad to organize colorful cylinders by clicking on stacks.

Use empty pegs as temporary holding spots whenever you can; they give you breathing room. Before moving a cylinder, scan all pegs for an identical color sitting on top. Don't auto-click the biggest stack first—sometimes clearing the shortest stack opens the whole board. If you get stuck, undo one move and look for a different color pair to free up. Focus on completing one full color tower at a time rather than spreading moves everywhere. Click slower than you think. A rushed drop can block a solution for several turns.

Q: Is Stack Sorting free to play? A: Yes, it's completely free in your browser with no hidden paywalls or subscriptions. Q: Do I need to download anything to play Stack Sorting? A: No download needed. It runs directly in your browser as an HTML5 game. Q: Can I play Stack Sorting on mobile? A: Yes, touch controls work on phones and tablets, though a mouse gives the best precision. Q: What if I get stuck on a level? A: Use the undo button if available, or restart the level—there's no penalty for restarting. Q: Does Stack Sorting have a timer? A: No, it's untimed. You can take as long as you need to solve each sorting puzzle. Q: Is Stack Sorting unblocked at school? A: It loads from an unblocked games site, so it usually works on school or office networks.