Marble Sort Level 321 Walkthrough & Solution

Level 321 Board Overview: Four Gift Box Blockade

The verified walkthrough identifies the opening board as Four Gift Box Blockade. The first confirmed moves are: Open by dropping the Brown cluster that sits dead-center at the Top Tray bottom straight into the third bottom Box. Then: Then tap the Dark Blue marbles right beside the Browns and funnel them into any open Dark Blue bottom Box. The next safe order is recorded below so the belt does not fill with bait.

The Trap in Marble Sort Level 321

• Opening bait: Keep stripping the bright Green and Red marbles that sat above the Browns, since each neighbor drop lowers the “3” and “2” counters shown on the Gift Boxes.
• Board order: Leave the far-left Light Blue and far-right Purple flanks completely alone until the center route is broken.
• Belt discipline: Use only the first verified clears here; do not spend belt space on a color without an active receiver.

Marble Sort Level 321 Step-by-Step Walkthrough

Opening: follow the safe first clears

1. Open by dropping the Brown cluster that sits dead-center at the Top Tray bottom straight into the third bottom Box.
2. Then tap the Dark Blue marbles right beside the Browns and funnel them into any open Dark Blue bottom Box.
3. Keep stripping the bright Green and Red marbles that sat above the Browns, since each neighbor drop lowers the “3” and “2” counters shown on the Gift Boxes.

Midgame: open the next receiver path

After the opening clears, let the next exposed groups move only when their receiver is ready.

4. Leave the far-left Light Blue and far-right Purple flanks completely alone until the center route is broken.
5. When the Gift Boxes burst, big 3x3 chunks of Light Green and Dark Green flood out, so start feeding the revealed textured Purple marbles into the active Purple box.
6. Shove the Light Green marbles into the second bottom Box slot so the Conveyor Belt has room to breathe.

Cleanup: finish the remaining sequence

The final phase follows the remaining source order. Pause whenever the belt starts to fill.

7. Finish by clearing the last Purple box, then dump the remaining Light and Dark Green waves into their matching bottom slots to close the level.
8. Finish the remaining receiver boxes in the verified source order and keep the conveyor clear.

Level 321 Tips Recap

• Keep stripping the bright Green and Red marbles that sat above the Browns, since each neighbor drop lowers the “3” and “2” counters shown on the Gift Boxes.
• Shove the Light Green marbles into the second bottom Box slot so the Conveyor Belt has room to breathe.
• Finish the remaining receiver boxes in the verified source order and keep the conveyor clear.