Marble Sort Level 87 frustrates because the game limits your opening to the right side and makes the front colours useless. A vertical chain holds the left side hostage, and the starting colours don't match what your bottom Boxes actually want — so the belt is under pressure from the very first tap.
The left side has two columns under a Tunnel marked with a 3, with Pink and Yellow blocks below it. The right side's bottom row runs Pink, a Red block, a Light Blue block and a Purple block, but your top Boxes want Light Green, Light Green, Dark Blue and Orange. The golden key waits above, right below a 3x3 Hidden Box grid.
Marble Sort Level 87 Walkthrough
The game wants you to panic and tap the Red, Light Blue and Purple at the bottom, but their Boxes are buried in rows two, three and four. Instead, look higher: above the Purple sits a Light Green, above the Light Blue sits a Purple, above the Red sits an Orange. Use the belt as a temporary waiting room while you snipe those exact colours.
Clear the top row, then dig into the Hidden Box grid toward the key.
How to Beat Marble Sort Level 87 — Step-by-Step
Dodge the first colour trap
- Park the Purple block on the far right to expose the Light Green above it.
- Tap that Light Green for the top-left Box — an early clear that keeps the belt from filling.
- Park the Light Blue block in the second-to-last column. Leave the Red block alone.
- Dig toward the top-right to expose the Orange block, then clear the Orange Box.
- Match the Light Blue sitting on your belt to the second layer's Light Blue Box.
Unlock the chain
- Pull the blocks right beneath the gold key in the Hidden Box grid to drop it.
- The chain shatters and the left side goes live — Pink and Yellow are now reachable.
- Feed the new Pink, Yellow and Brown Boxes from the left columns.
Manage the final Tunnels
- Only tap a block under a Tunnel when its matching Box is active and empty.
- Clear the textured bubble blocks first — they block the final colours.
- Keep the belt to three colours max, and clear one before touching the Tray again.
Tips & tricks
- The front Red, Light Blue and Purple are bait — their Boxes are rows deep.
- Use the belt as a waiting room for the Purple and Light Blue you park early.
- Snipe the Light Green and Orange from the upper right instead of touching the bottom.
Common mistakes
- Tapping the bottom Red, Light Blue or Purple just because they're accessible. Their Boxes are buried, so they loop.
- Pulling a Tunnel block when the active Boxes don't match, clogging the belt at the finish.
Marble Sort Level 87 FAQ
Why does my Conveyor Belt flood on Marble Sort Level 87?
You tapped the bottom Red, Light Blue or Purple blocks, whose Boxes are buried in rows two, three and four. They loop on the belt.
Which color do I clear first on Marble Sort Level 87?
Park the Purple, then tap the Light Green above it for the top-left Box. That early clear keeps the belt from filling.
How many moves does it take to clear Marble Sort Level 87?
Three phases — dodge the front bait, unlock the chain, then drain the Tunnels. Around a dozen taps with some parking.
Do I need boosters to beat Marble Sort Level 87?
No. Snipe the upper-right colours and use the belt as a waiting room. Boosters won't find the key for you.
What happens if I tap the front Red block on Marble Sort Level 87?
It drops onto the belt with no Red Box until the lower rows, so it sits there and blocks your space while you hunt the key.
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