This board is a Mystery Box puzzle with a Lock and Key mechanic. The key to beating Marble Sort Level 371 is to clear the center Purple first, then work from the inside out, leaving the edge Orange marbles untouched until the right-side Orange Box is exposed.
The Top Tray is arranged with Orange marbles along the outer edges, a 4x4 grid of gray Mystery Boxes in the middle, and four keys scattered: a Red key at the top left, a Pink key on the left side, a Purple key in the center, and another Purple key on the right side. The bottom area has four columns of Boxes: the active front row requires two Purple Boxes on the left and two Pink Boxes on the right. Behind them, the first column hides Pink and White, the second column is stacked with Purple, and the fourth column contains a Red Box sealed with a Lock and Key, buried under Pink, Purple, and Orange.
Marble Sort Level 371 Walkthrough
From left to right, the active bottom Boxes demand Purple, Purple, Pink, and Pink. You must feed these colors exclusively at the start.
The main trap is the Orange marbles on the edges: they look tempting but cannot be placed until much later, so touching them early will jam the Conveyor Belt and end the run.
How to Beat Marble Sort Level 371 — Step-by-Step
Phase one: Opening clears
- Tap the front Purple and Pink marbles in the Top Tray and guide them into the matching bottom Boxes.
- Once the front row drops, tap the center Purple key marble to release it and feed it down.
- Do not touch the Orange marbles on the edges; they are a decoy.
- Continue sending the newly exposed Purple marbles down to empty the second layer of the Purple Boxes.
Phase two: Breaking the Mystery Boxes
- After the initial clears, the left column now needs White, and the third column needs Pink.
- Drop the White marbles from the top to clear the White Box.
- Tap the lowest gray Mystery Boxes one at a time to reveal their colors.
- Only send down colors that match the active bottom Boxes; leave Yellow or Red revealed in the Top Tray.
- Grab the Pink key on the left side and use it to unlock the corresponding lock.
Phase three: Unlocking the final stack
- Now the right-side bottom stack is exposed down to the Orange Box.
- Drop the edge Orange marbles into the Orange Box.
- Search through the remaining top-left Mystery Boxes to find the Red key.
- Drop the Red key marble to break the lock on the Red Box.
- With the lock gone, the final Yellow and Red bottom Boxes become active; clear the rest of the Top Tray to finish.
Tips & tricks
- Always prioritize the center Purple key early; it opens up the board.
- Keep the Conveyor Belt empty by only moving colors that can be placed immediately.
- When revealing Mystery Boxes, do it slowly; one wrong reveal can block your progress.
Common mistakes
- Tapping the Orange marbles at the start will flood the Conveyor Belt and end the level.
- Revealing too many Mystery Boxes at once can clutter the Top Tray with unplaceable colors.
- Ignoring the Red key until the end forces you to backtrack and wastes space.
Marble Sort Level 371 FAQ
Why does my Conveyor Belt flood on Marble Sort Level 371?
Your Conveyor Belt floods because you likely tapped the Orange marbles too early or revealed too many Mystery Boxes without having matching bottom Boxes ready.
Which color do I clear first on Marble Sort Level 371?
Clear the center Purple first, as it unlocks the key and opens up the board.
How many moves does it take to clear Marble Sort Level 371?
There is no fixed move count, but following the walkthrough efficiently should take around 50-60 moves.
Do I need boosters to beat Marble Sort Level 371?
No, boosters are not required if you follow the correct order and avoid the early trap.
What happens if I tap the Orange marbles early on Marble Sort Level 371?
If you tap the Orange marbles early, your Conveyor Belt will jam because there is no active Orange Box until much later, likely causing a failure.
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