Cat Stack Sort: Color Puzzle

Sort cute cats into cozy color-matched boxes! 200 relaxing levels plus Nine Lives and Double Trouble modes. A calm puzzle break, anytime, anywhere.

Sort the cats. Empty your mind.

Cat Stack Sort is a cozy, Water Sort-style color puzzle starring square, big-eyed cats who nap, blink, and watch your every move. Tap a box to lift its top group of cats, then tap (or drag) them into another box — but only if the color matches or the box is empty. Match a full stack of one color and the box seals shut with a happy little click.

It's simple to learn, endlessly satisfying to master, and perfect for a quick break or a long, relaxing session.

WHAT'S INSIDE • 100 hand-tuned Classic levels, unlocking one after another as you clear them • Nine Lives — a second 100-level set (levels 101-200) that opens right after Classic level 100, for players who want more • Double Trouble — a twist on the rules with 20 extra levels, unlocked once you clear Classic level 30 • Play your way: tap-to-select-and-move, or drag the cats straight into their new box — both work side by side • A first Undo on every level, free — need another? A quick ad brings it back • Stuck? Watch a short ad to add an extra empty box and give yourself more room to think • A soft, hand-drawn look: orange, purple, and green tones, animated cat silhouettes drifting in the background, and cats that sleep and track the action with their eyes • No account, no sign-up, no pressure — your progress saves right on your device

Cat Stack Sort is supported by banner, interstitial, and rewarded ads so it can stay free for everyone.

A gentle puzzle for cat lovers and sorting addicts alike — pick up your phone, stack a few boxes, and see how far you get.