Colour Sort

Six tubes, four shapes, and everything mixed up. Pour one tube into another when their top items match — or into an empty tube — until every shape sits together. A pour moves the whole matching run, not one item, and the digit at each tube's mouth tells you how many that would be.

It runs entirely on your device: 0 network requests, works offline. No ads, no account, nothing to buy, and no betting, money or prizes of any kind.

1. Focus the board — click it, or press Tab until it is focused.
2. Move with the left and right arrow keys.
3. Pick a tube up with Enter, then press Enter on another to pour into it.
4. Watch the digit at each mouth: it is the size of the run a pour would move.
5. Finish every shape before the pours run out. A finished tube is marked, not just tinted.

How do you solve a tube or ball sorting puzzle?

Work backwards from the end rather than tidying whatever looks worst. The end state needs one tube per shape, so the real question is which tube each shape will finish in — decide that first, and every pour either serves that plan or wastes a move. The practical rule that follows: never pour onto a shape that still has items buried under it, because you are adding to a pile you will have to move again. Empty tubes are the scarce resource, so spend one only to uncover something you need, never just to make the board look tidier.

Is every deal actually solvable?

Yes, by construction. Deals are made by starting from the solved position and running the game backwards — every scramble step is the exact inverse of a legal pour, so the forward sequence that undoes them always exists. That is why there is no undo button and no "restart level" prompt here: those exist in this genre because shuffled deals can be impossible, and these are not shuffled.

Why does one pour move several items?

Because the run is the unit. Moving items one at a time would turn a solved plan into a lot of identical clicks, and the interesting decision is which tube to pour into, not how many times to tap. The digit at the mouth means you never have to count the run yourself.

Do I need to see colour to play this?

No. Every shape is a distinct glyph — circle, triangle, square, diamond — as well as a fill, and the screen reader announces them as shapes. The puzzle is fully playable in greyscale.

Does it work offline?

Yes. Once the page has loaded once, the whole game is on your device. There is no server involved in play at any point.

Is there any money, betting or in-app purchase in this?

None, and there never will be. No currency, nothing to buy, no extra tubes for sale, no wager of any kind.

Can I play it with a keyboard or a screen reader?

Both. Arrows move, Enter picks up and pours, and each tube announces its contents bottom-up along with the size of its top run and whether it is finished.

Four shapes, four deep, in six tubes — two of them spare. Deals are built from fourteen reverse pours, with a budget that is comfortably above what undoing them takes.

Slide Fifteen is the other tile puzzle here, and it shares the discipline: both punish tidying locally instead of planning the end state.

Bookmark this page (Ctrl+D, or ⌘D on Mac) or install the app — it works offline the next time you need it.