Marble Sort Level 143 — Walkthrough and Solution

Marble Sort Level 143 presents a Top Tray with alternating visible and hidden rows, plus a Lock and Key mechanic that seals your lower Boxes. The board is set up so that only a few colors are immediately useful: Light Pink, White, Dark Blue, and Red. The rest are decoys that will clog your Conveyor Belt if you tap them too early. The key to beating this level is to follow a strict order: first clear the Light Pink marbles on the far left of the bottom row, then use the newly emptied space to handle the Purple and Green marbles that block the first row of mystery blocks. Once you reveal the third row, you can feed White and Dark Blue into their matching Boxes, which unlocks the next set of Boxes and lets you access the Keys needed to break the padlocks. The entire level hinges on not tapping any marble that you cannot immediately place, as the Conveyor Belt has limited capacity and the mystery blocks hide colors that can either save you or sink you.

In the Top Tray, the bottom row from left to right contains Light Pink, Purple, Green, Purple, Yellow, and Light Pink. Above that row is a line of grey mystery blocks, and behind them is a row with a Pink Key, White marbles, a Green Key, Dark Blue marbles, and another Green Key. Further up, there are more mystery blocks and a top row with a Light Blue Key and an Orange Key. At the bottom, your starting Boxes are White, Red, Light Pink, and Dark Blue, with additional locked Boxes behind them. The right side of the Conveyor Belt will become crowded early because you must push the Purple and Yellow marbles down to expose the mystery blocks, but you cannot place them anywhere until you unlock more Boxes.

Marble Sort Level 143 Walkthrough

Your front-row Boxes demand, from left to right: White, Red, Light Pink, and Dark Blue. That means the only visible marbles in the bottom row of the Top Tray that you can use immediately are the Light Pink ones on the far left. The Purple, Green, and Yellow marbles are all traps—they have no matching Boxes at the start and will only consume belt space. The first row of mystery blocks is the true gatekeeper: you must clear the bait colors above them to reveal what lies beneath. Only after you break through that first blind wall can you access the White and Dark Blue marbles that match your starting Boxes. The puzzle's difficulty comes from the fact that you have to store junk colors temporarily while you dig for the ones you need, and the Conveyor Belt has a limited capacity.

How to Beat Marble Sort Level 143 — Step-by-Step

Phase one: Clear the initial Light Pink and expose the first mystery row

1. Tap the Light Pink marble on the far left of the bottom row in the Top Tray. It will fall into the Light Pink Box in the front row, clearing it and revealing an empty slot below.
2. That empty slot is actually the top of a Purple Box. So tap the Purple marble that is second from the left in that same bottom row, and drop it into that Purple Box.
3. Now you must clear the remaining Green, Purple, and Yellow marbles from the bottom row. Tap them one by one to send them to the Conveyor Belt, but do not drop them into any Box yet because there is no matching Box available. This step is purely to remove the visible marbles that are blocking the mystery blocks.
4. Once the bottom row is empty, you will see the first row of mystery blocks. Tap each block to reveal its hidden color. If it is White, Red, or Dark Blue, immediately route it to the matching Box in the front row. If it is any other color (like Green, Purple, or Yellow), leave it on the Conveyor Belt for now.

Phase two: Unlock the midgame by clearing White and Dark Blue

1. After you have cleared the first row of mystery blocks, the third row of the Top Tray is exposed. This row contains White marbles and Dark Blue marbles, among others. Tap the White marbles and drop them into the White Box, and do the same for the Dark Blue marbles into the Dark Blue Box.
2. Clearing those Boxes will cause the locked Boxes behind them to slide into the front row. You will now see Locked Blue and Locked White Boxes appear, which require Keys to open.
3. Look at the Top Tray for the Pink Key and the Green Key. You must clear the marbles that are blocking these Keys. For example, if the Pink Key is trapped behind some Purple marbles, you need to move those Purple marbles to an empty Box or the Conveyor Belt. Once a Key is free, tap it to drop it down and it will shatter the corresponding padlock on a locked Box.
4. After unlocking the new Boxes, use them to drain the junk colors (Green, Yellow, Purple) that you stored on the Conveyor Belt earlier. This will free up space on the belt, which is essential for the upcoming challenges.

Phase three: Handle the second mystery row and final keys

1. Now you face a second row of mystery blocks. Treat them with caution: tap them one at a time and try to match their revealed colors with any open Boxes. Do not pull down any visible marbles from the fifth row until you have dealt with these blocks.
2. The fifth row contains Black, White, Light Pink, and two sets of Dark Blue marbles. Route the Black marbles into the Black Box that appears later in the rotation. For the others, match them to their corresponding Boxes.
3. Do not touch the top row yet. It holds the Light Blue Key and Orange Key, but you must wait until the Locked Orange and Locked Light Blue Boxes have cycled to the front row. If you drop those Keys too early, they will clog the Conveyor Belt because the locked Boxes are not yet accessible.
4. Once the Locked Orange and Locked Light Blue Boxes are in the front row, tap the corresponding Keys to break their padlocks. Then, finish by sweeping the remaining Dark Blue and White marbles into their final slots. Keep your tapping slow and deliberate at the end to avoid overfilling the belt with a color that is still blocked by a lock.

Tips & tricks

• Always prioritize clearing the Light Pink marble on the far left first; it is the only safe initial move that opens up a slot for the Purple.
• When you reveal a mystery block, if the color matches an existing Box, drop it immediately. If not, keep it on the belt but remember to clear it later.
• Use the Conveyor Belt as a temporary storage, but never let it fill up completely. If the belt is full, you cannot tap any more marbles, so plan your moves ahead.
• Watch for the Keys: they are essential to unlock the locked Boxes, but they must be dropped at the right moment. Wait until the corresponding locked Box is in the front row.

Common mistakes

• Do not tap any of the bait colors (Green, Purple, Yellow) early unless you have a matching Box or empty slot. They will only clog the belt.
• Do not drop the Keys until the matching locked Box is visible; otherwise, the Key will sit on the belt uselessly.
• Do not rush through the mystery blocks. Tap them slowly and check the color against your available Boxes before proceeding.
• Avoid tapping the top row too early; it is a trap that can flood your belt with Keys that you cannot use yet.

Marble Sort Level 143 FAQ

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