Marble Sort Level 221 is a strict sequence puzzle that punishes impulsive pulls. You must prioritize the three safe colors on the bottom row of the Top Tray and avoid the Brown and White blocks until their matching Boxes appear. The center is locked by three yellow pins, and two numbered blue Tunnels (marked 4) hide a flood of extra marbles.
The Top Tray bottom row exposes Dark Red, Magenta, Light Pink, Brown, and White from left to right. The starting bottom Boxes demand Light Green, Magenta, Dark Red, and Light Pink from left to right. The only Lime Green is trapped behind the yellow pins in the middle column, making the Light Green Box a decoy.
Marble Sort Level 221 Walkthrough
The first bottom Box on the left asks for Light Green, but that color is impossible to reach initially. Your opening moves must clear the Magenta, Dark Red, and Light Pink Boxes using only the exposed blocks.
The trap is that pulling Brown or White early jams your Conveyor Belt because they have no destination. You must leave them anchored until later phases.
How to Beat Marble Sort Level 221 — Step-by-Step
Phase one: Clear the front line without touching the edges
- Send the Dark Red block from the bottom-left of the Top Tray down to the third Box.
- Route the Magenta block from the second column into the second Box.
- Drop the Light Pink block from under the center pin into the far-right Box.
- Stop pulling. Do not touch Brown or White.
Phase two: Release the center and open the Tunnels
- Pull the Lime Green block now that it has dropped from the center. Feed it into the empty far-left Box.
- Watch the next row of Boxes slide in, likely Orange, Purple, and fresh Green.
- Clear the blocks in front of the blue Tunnels to activate them.
- As the Tunnels count down from 4 to 3, Cyan and Pink marbles spill out. Match the Cyan from the top-left center column into its Box.
Phase three: Survive the late-game flood
- Pull the Orange block from the top-right into the new Orange Box.
- Only pull the Brown block when a Brown Box appears on the bottom row.
- Alternate pulls between both Tunnels to keep two color options flowing.
- Finish by sending White and Purple strings to close the remaining hidden Boxes.
Tips & tricks
- Always check the bottom Boxes before pulling any block; never pull a color that has no matching Box.
- Keep the Conveyor Belt clear by making every pull count — a single wasted block can jam the system.
- When the Tunnels open, balance your pulls so you don't get stuck with only one color available.
Common mistakes
- Pulling Brown or White early because they look safe — they will clog your belt.
- Forcing the Light Green Box too soon instead of waiting for the center lock to release.
- Emptying one Tunnel completely while ignoring the other, leaving you with limited options.
Marble Sort Level 221 FAQ
Why does my Conveyor Belt flood on Marble Sort Level 221?
It floods when you pull Brown or White before their Boxes appear, because those marbles have nowhere to go and sit on the belt.
Which color do I clear first on Marble Sort Level 221?
Clear Dark Red first, then Magenta, then Light Pink, matching the first three Boxes from the left.
How many moves does it take to clear Marble Sort Level 221?
There is no fixed move count, but expect roughly 30-40 pulls depending on how efficiently you route the Tunnels.
Do I need boosters to beat Marble Sort Level 221?
No, boosters are not required if you follow the sequence and avoid early edge pulls.
What happens if I pull the Brown block early on Marble Sort Level 221?
The Brown block will jam your Conveyor Belt, leaving you with no space to clear the next required colors, forcing a restart.
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