Marble Sort Level 690 is a puzzle that demands careful sequencing. The board is built with a central lock that holds the middle sections closed, and many boxes on the top tray are hidden behind question-mark tiles. To succeed, you must follow a specific order: first clear the bottom row's front boxes, then find the orange key, then manage the connected pink boxes, and finally handle the arrow box.
The layout has a top tray with several vertical yellow latches and a chain across the middle. On the top tray's outer edges, there are gray boxes with question marks. The bottom tray has a front row containing Purple, Yellow, White, and Light Blue boxes. Behind the Purple box on the far left, there are two Pink boxes linked by a black bar. Deeper in the stack, an arrow connects a central Pink box to a Green box on the right side.
Marble Sort Level 690 Walkthrough
The bottom front row consists of, from left to right, a Purple box, a Yellow box, a White box, and a Light Blue box. These are your initial active targets. You must clear them in a specific order to access the key.
The main trap is the pair of Pink boxes linked together on the left. If you release them too early, they will demand many Pink marbles at once, which can clog your Conveyor Belt. Also, the arrow box ties a central Pink box to a Green box on the right, so you must clear the Pink anchor first before the Green target becomes active.
How to Beat Marble Sort Level 690 — Step-by-Step
Phase one: Unlock the center
- Leave the question-mark boxes on the top left and right untouched.
- Focus on the front row of the bottom boxes: Purple, Yellow, White, and Light Blue.
- Look at the top tray's center, where you can see Yellow and White marbles below the lock.
- Send the Yellow marbles down to empty the front-row Yellow box.
- Then route the White marbles to clear the front-row White box.
- Dig down the middle-right column to expose a box holding an orange key.
- Avoid releasing any Pink marbles from the top for now, because the left side has those linked Pink boxes that would jam your belt.
- Clear the key box. This action releases the center padlock, and the yellow side latches slide away, opening the board.
Phase two: Handle the linked boxes and mystery boxes
- With the lock gone, the middle columns now expose Blue, Light Green, and Red marbles.
- Prepare your Conveyor Belt by ensuring you have at least four empty slots before you let the linked Pink boxes drop into the active front row.
- Feed the linked Pink boxes by matching the Pink marbles that are now available from the center area.
- Clear those Pink boxes quickly to remove them from your way.
- Start testing the outer question-mark boxes one at a time. If a revealed color does not have an active bottom box, leave it in the top tray.
- Do not tap three question-mark boxes in a row; doing so would dump three different colors onto the belt and likely end your run.
Phase three: Arrow box and final cleanup
- As you progress, the top tray will reveal large blocks with capacity for nine marbles each, in Cyan, Pink, and Green.
- The arrow box appears on the bottom tray, linking a central Pink box to a Green box on the right.
- You must first clear the anchor Pink box. Route all matching Pink marbles into that active box, ignoring the Green marbles above for now.
- Once the anchor is empty, the target Green box becomes active.
- Now you can release the heavy Green marble clusters from the top tray.
- Feed the remaining large blocks into the final bottom boxes, keeping your belt clear and matching the big groups.
- With the arrow box resolved and the center cleared, finish by basic matching to empty all boxes.
Tips & tricks
- Always keep an eye on your Conveyor Belt's free space; never let it fill up with unplaceable colors.
- When you open a question-mark box, if it shows a color you cannot place right away, leave it and work on other tasks.
- Prioritize clearing the linked Pink boxes quickly once you have enough Pink marbles, to free up space.
Common mistakes
- Tapping too many question-mark boxes early, which floods your belt with random colors.
- Releasing the linked Pink boxes before you have enough Pink marbles and free belt space.
- Ignoring the arrow box order, causing you to waste moves trying to clear the Green box before the Pink anchor.
Marble Sort Level 690 FAQ
Why does my Conveyor Belt flood on Marble Sort Level 690?
Your belt floods because you tap multiple question-mark boxes in quick succession, which drops several different colors that you cannot place immediately, filling your limited space.
Which color do I clear first on Marble Sort Level 690?
You should clear Yellow first, as it is the leftmost front-row box that you can start emptying right away, followed by White to open the path to the key.
How many moves does it take to clear Marble Sort Level 690?
The level requires roughly 100 to 130 moves, depending on how efficiently you avoid wasting taps and how well you manage the question-mark boxes.
Do I need boosters to beat Marble Sort Level 690?
No, you do not need boosters, but having a color bomb or shuffle can help if you get stuck, though careful planning makes them unnecessary.
What happens if I release the linked Pink boxes too early on Marble Sort Level 690?
If you release the linked Pink boxes too early, the game will demand many Pink marbles at once, and if your belt is full of other colors, you will be unable to match them and will likely run out of moves.
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