Marble Sort Level 387 — Walkthrough and Solution

Marble Sort Level 387 is a Lock-and-Key puzzle wrapped in a Crate-and-Chain maze. The top Tray is split by a vertical gap; its bottom edge shows Light Blue on the far left, then Orange, Pink, Yellow, and Light Green across to the right. Below, the front row of Boxes demands Orange on the left, Dark Green next, Dark Blue third, and Pink on the far right. The catch: no Yellow or Light Green Box exists anywhere in the visible first two rows, so those colors are pure bait that will choke your Conveyor Belt if tapped early. The real path demands breaking a wooden Crate low on the right to grab the gold Key, which shatters the iron Chain holding the upper-right marbles hostage, then dealing with the left Crate and the five blue Tunnels that each spit out 3 hidden marbles late.

Your first priority is to clear Orange and Pink into their front Boxes without touching the decoy colors. That exposes Hidden Boxes that should reveal Dark Green or Dark Blue to fill the remaining front slots. Only after the front row is satisfied do you shift to smashing the right Crate, then the left Crate, and finally routing the Tunnel output while keeping your belt clear. The whole board is a test of restraint: never tap a color without a home in sight.

Marble Sort Level 387 Walkthrough

The bottom Boxes read left-to-right as Orange, Dark Green, Dark Blue, Pink in the front row. The second row, once the front slides away, adds a Light Blue Box in the second column. The third row hides three Hidden Box containers whose colors stay masked until they become active. No Yellow or Light Green Box exists in any visible row, so those top-Tray marbles are decoys that will jam your conveyor.

The imbalance is glaring: the right side of the Tray offers Yellow and Light Green with no home, while the left side hides Dark Green and Dark Blue under Hidden Boxes. The board funnels you toward tapping the bait first, but that instantly fills your belt with unplaceable colors. The only safe opening is to ignore the right two columns entirely until the right Crate is broken and the Key unlocks the upper-right supply of needed colors.

How to Beat Marble Sort Level 387 — Step-by-Step

Phase one: Clear the front row without touching bait

1. Tap the Orange marble in the second column of the Tray, sending it to the front-left Orange Box.
2. Tap the Pink marble in the third column, routing it to the front-right Pink Box.
3. Stop immediately; leave Light Blue, Yellow, and Light Green untouched.
4. Watch the Hidden Boxes that slide into view—uncover Dark Green or Dark Blue to fill the two middle front Boxes.
5. When the Light Blue Box slides forward in the second column, feed the far-left Light Blue marble into it.

Phase two: Break the right Crate and grab the gold Key

1. Focus taps on the right side of the Tray, just below the gold Key.
2. Clear three adjacent marbles touching the wooden Crate to smash it completely.
3. After the Crate breaks, drop the block directly under the Key to activate it; the Key flies up and unlocks the Chain.
4. Work quickly once the Chain shatters—the upper-right section opens, giving you Dark Green and Dark Blue matches for the bottom Boxes.
5. Treat every Hidden Box reveal as a decision point: if the color has no bottom Box, leave it alone.

Phase three: Clear the left Crate and survive the Tunnels

1. Shift to the upper-left and clear blocks around the high Crate.
2. Break that left Crate to expose the remaining Hidden Boxes underneath.
3. Keep at least two slots open on your Conveyor Belt at all times—the third row's Hidden Boxes will demand unexpected colors.
4. Trigger the blue Tunnels one at a time, never rapid-fire; wait for each to spit its 3 marbles, route them to matching Boxes, then move on.
5. Finish by clearing the last top-left colors, keeping your belt clean to the end.

Tips & tricks

• Always scan the visible Box rows before tapping any Tray marble; if there's no matching Box, it's bait.
• Use Hidden Box reveals to plan your next two moves—they often bring the exact color you need to unlock progress.
• When the Tunnels activate, pause after each one to sort its output; rushing causes belt jams that are nearly impossible to clear.

Common mistakes

• Tapping Yellow or Light Green early because they look harmless—they will sit on your belt forever.
• Rapid-firing the Tunnels without sorting each batch, flooding your conveyor with 15 marbles at once.
• Forcing a Hidden Box color onto the belt when no Box exists, blocking the space needed for later matches.

Marble Sort Level 387 FAQ

Get the Official Game

⬇ Download Marble Sort

Back to the full Marble Sort level list.