Sort Dock: how to pour, undo, and solve every tube
Sort Dock is a calm color-sorting puzzle that runs in your browser. Each level starts with a row of tubes filled with a mix of colored cargo. Your job is to pour cargo between tubes until every tube holds a single color, with no mixing.
On this page (6 sections)
What is Sort Dock
The board is a row of clear test tubes on a dock. Each tube holds zero to four layers of colored cargo. At the start of a level, cargo is mixed across the tubes with two extra empty tubes you can use as scratch space. The level is solved when every tube either contains a single full color or is empty.
The pour rule in plain English
- Tap any tube to select it. The selected tube is highlighted.
- Tap a second tube to pour from the selected tube into the target tube.
- A pour only happens if the top color of the source matches the top color of the target, or the target is empty.
- Pouring drains the source tube until either it is empty, the top color no longer matches, or the target is full.
- Invalid moves are refused with a board shake and a red message.
Undos and difficulty
Every level gives you a small number of undos. Easy gives five undos, Normal gives three, and Hard gives just one. The Undo button is the only way to take a move back. There is no time limit, but lower move counts give a higher score at the end of the level.
| Difficulty | Colors | Undos | Score pressure |
|---|---|---|---|
| Easy | 3 | 5 | Low |
| Normal | 4 | 3 | Medium |
| Hard | 4 | 1 | High |
A 3-step walkthrough for your first level
- Open TapLoop Arcade and pick Sort Dock from the side rail.
- Tap a tube with a single-color top. Tap an empty tube next to it. The matching cargo pours across.
- Build up a single-color tube in one of the empty slots, then use it as a landing pad for the remaining mixed tubes.
When you are stuck
If no legal pour is possible, the next move is to undo a recent move and try a different path. Hard difficulty gives you only one undo, so be deliberate. A common pattern is to start by building two of the four colors in the empty tubes, then use the leftover half-filled tubes as pour sources to finish the last two colors.
Keyboard and touch tips
Sort Dock is fully touch-friendly. On desktop, the same tap-to-pour flow works with a mouse. There are no keyboard shortcuts for the board itself, but the global shortcuts still work: H for hint-style help is not used in Sort Dock, but R starts a new round, and the side rail keys jump to other TapLoop games.
Who this game is for
- Players who like water-sort or ball-sort mobile games
- Short brain-training sessions during a break
- Anyone working on planning ahead and reading the board
Frequently asked questions
Quick answers to the most common questions about Sort Dock.
How many tubes are in a level?
Three-color levels use five tubes total: three mixed plus two empties. Four-color levels use six tubes total: four mixed plus two empties. Tube capacity is always four layers.
Can I pour more than one color at a time?
Yes. If the top two or three layers of a tube are the same color, they all pour together as long as the target accepts the same color and has room. The pour stops the moment the next layer is a different color.
Is there a timer?
No timer. Your score is reduced by the number of moves you make, so the goal is to solve the board in as few moves as possible without burning undos.
What if I run out of undos?
Tap New round in the toolbar to start the level over. Your best score is preserved.
Ready to play Sort Dock?
Open the game in your browser. No download, no sign-up — just tap and play.
Play Sort Dock now