Marble Sort Level 300 Walkthrough & Solution

Level 300 Board Overview: Giant line Lock and Left-Side Mystery Trap

The verified walkthrough identifies the opening board as Giant line Lock and Left-Side Mystery Trap. The first confirmed moves are: Work only the left side at first — grab the rough-textured Pink piece at the bottom edge, then send the solid Cyan and Brown blocks that rest above it into the active front boxes. Then: That Pink clear uncovers a solid Red, so tap it right away to empty the right-most front box. The next safe order is recorded below so the belt does not fill with bait.

The Trap in Marble Sort Level 300

• Opening bait: Move on to the second row of boxes (Dark Blue, Yellow, Dark Blue, White) by pulling the textured Dark Blue from the left edge.
• Board order: Chip away the blocks that crowd the golden key, dropping matching colors so the numbered Panels tick down while leaving the gray Mystery Boxes untouched.
• Belt discipline: Use only the first verified clears here; do not spend belt space on a color without an active receiver.

Marble Sort Level 300 Step-by-Step Walkthrough

Opening: follow the safe first clears

1. Work only the left side at first — grab the rough-textured Pink piece at the bottom edge, then send the solid Cyan and Brown blocks that rest above it into the active front boxes.
2. That Pink clear uncovers a solid Red, so tap it right away to empty the right-most front box.
3. Move on to the second row of boxes (Dark Blue, Yellow, Dark Blue, White) by pulling the textured Dark Blue from the left edge.

Midgame: open the next receiver path

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

4. Chip away the blocks that crowd the golden key, dropping matching colors so the numbered Panels tick down while leaving the gray Mystery Boxes untouched.
5. Strike the key to snap the chain and unlock the right half of the Top Tray.
6. Send the Yellow blocks on that freed side home, then keep knocking down the numbered-3 Panels across both flanks to expose the back layers.

Cleanup: finish the remaining sequence

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

7. Once the bottom boxes shift to Light Green, Dark Green, and Purple, pull those shades from the right side and keep at least three belt slots open before you tap anything else.
8. Freeze your taps whenever the belt drops to two open slots, pause for a box to clear, and let the front boxes steer your final moves.

Level 300 Tips Recap

• Move on to the second row of boxes (Dark Blue, Yellow, Dark Blue, White) by pulling the textured Dark Blue from the left edge.
• Send the Yellow blocks on that freed side home, then keep knocking down the numbered-3 Panels across both flanks to expose the back layers.
• Freeze your taps whenever the belt drops to two open slots, pause for a box to clear, and let the front boxes steer your final moves.