Marble Sort Level 728 — Walkthrough and Solution

Marble Sort Level 728 is a puzzle where a giant Panel with the number 20 blocks the entire top-left section. You must clear twenty lower Boxes before that area opens, so the early and middle parts of the level force you to work with a very small set of marbles. The winning move is to always match only the colors that sit in the active front row, and to avoid pulling any extra colors from the side Tunnels until you have a matching empty Box ready.

The board starts with the 20-clear Panel on the top left. Directly under that Panel there are three vertical Tunnels, and below those sit clusters of Yellow and Red marbles that are locked away. On the top right side of the Top Tray, there are three horizontal Tunnels whose exposed ends show Yellow, Light Blue, and Pink/Purple marbles. The bottom area is a grid of Boxes arranged four columns across and four rows down. The starting target Boxes are: in the front row, Light Blue on the far left, then Purple, another Purple, and Yellow on the far right. The second row holds Yellow on the left, Orange next to it, then two Light Blue Boxes. The third row has Brown, Light Blue, Brown, and Orange from left to right. The fourth row contains Purple, Yellow, Light Blue, and Orange.

Marble Sort Level 728 Walkthrough

Your first goal is to clear the front row Boxes: Light Blue on the far left, two Purples in the middle, and Yellow on the far right. You must feed those exact colors from the exposed Tunnels.

The biggest trap in Marble Sort Level 728 is the set of horizontal Tunnels on the right side. They look like a steady supply, but if you take marbles from them without having the matching Box ready below, those marbles will pile up on your Conveyor Belt. Since the left side of the Top Tray is frozen by the Panel, you have no spare space to hold extras, so the belt jams quickly.

How to Beat Marble Sort Level 728 — Step-by-Step

Phase one: Clear the front row

1. Tap the Light Blue marble that is exposed in the right horizontal Tunnel, and slide it into the far-left Light Blue Box.
2. Next, take the Yellow marble from the same right Tunnel and drop it into the far-right Yellow Box.
3. Now move to the left vertical Tunnels. Pull a Purple marble from there and release it into the first of the two center Purple Boxes.
4. Draw another Purple marble from the left vertical Tunnel and park it in the second center Purple Box.
5. Do not tap any Pink or Green marbles that are buried in the Tunnels, because they would fill your Conveyor Belt without a matching Box ready.
6. After the front row is empty, your attention shifts to the second row: Yellow on the left, Orange next to it, then two Light Blue Boxes.
7. From the right horizontal Tunnel, take a Light Blue marble and guide it into the first Light Blue Box in the second row.
8. Take another Light Blue marble from the same Tunnel and empty it into the second Light Blue Box.
9. Keep an eye on your Conveyor Belt space and do not overdraw.

Phase two: Work through the middle rows

1. Now target the third row: Brown on the left, Light Blue next, then Brown and Orange on the right.
2. Pull a Brown marble from the horizontal Tunnels and place it into the left Brown Box.
3. Take another Brown marble and deliver it to the second Brown Box in that row.
4. For the Orange Box in the far right of the third row, find an Orange marble in the right horizontal Tunnel and clear it.
5. Watch for a Mystery Box that appears in the third column. Clear the Box directly in front of it to reveal its color, and only then decide whether to feed it.
6. Shortly after, another Mystery Box drops in the fourth column. Reveal it the same way by clearing the Box in front.
7. As you continue, you will see Dark Green, Orange, and Pink/Red marbles appear more often. Match them into any open Boxes that match their colors to keep the Conveyor Belt moving.
8. Keep clearing Boxes until you reach the twentieth clear.

Phase three: Open the Panel and finish

1. Once the twentieth Box is cleared, the giant Panel lifts and reveals a new grid on the top left, containing Dark Blue, Red, and other colors.
2. Immediately look for Dark Blue marbles in that new area and route them into any matching Dark Blue Boxes on the bottom.
3. If Dark Green marbles have stacked up on your Conveyor Belt, send them to the Dark Green Box on the right side.
4. With the Panel gone, the tight space opens up. Now sweep the remaining Red and Light Green Boxes to complete the level.

Tips & tricks

• Count your available marbles before every tap, especially in the early rows.
• Always reveal Mystery Boxes as soon as they appear so you know what colors to expect.
• Use the right horizontal Tunnel sparingly; it is easy to flood your belt.

Common mistakes

• Pulling colors from the Tunnels without a matching Box ready.
• Ignoring the Mystery Boxes until your belt is full.
• Forgetting to keep the belt clear by matching Dark Green and Orange quickly.

Marble Sort Level 728 FAQ

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