This level is controlled by a massive chain that blocks half the board. One side holds the Key; the other side is completely locked down. Your early colours are Light Blue, Red, Green and Dark Grey, swinging into Purple and Yellow chaos later.
The left tower is your only viable start — Red, Light Blue and Green on the bottom edge, then Dark Grey, Brown and Light Pink above, then a 3x3 grid of Hidden Boxes with the Key near the top-left. The right tower is pure bait: Orange, Green and White at the bottom, then a chained Lock holding a row of Purple and Light Blue.
Marble Sort Level 99 Walkthrough
Your front row wants Light Blue, Dark Grey, Red and White, with a deep stack of Green Boxes behind the far-left and a Light Blue Box hiding behind the Red. Because the right side is locked, any colour that doesn't land in the front row sits on the belt and blocks traffic.
The whole opening is a single excavation up the left side. Don't even glance at the right until that Key drops.
How to Beat Marble Sort Level 99 — Step-by-Step
Dig for the Key
- Send the Light Blue on the bottom edge of the left tray into the far-left Light Blue Box.
- Send the Red on the bottom left into the Red Box in column three.
- Hold the Green until the front Light Blue clears — then the stack of Green Boxes underneath opens and you can drop it.
- Process the second layer: send the Dark Grey to column two, and work Brown and Light Pink as their Boxes appear.
- Peel the 3x3 Hidden grid on the left one tile at a time, only pulling colours that match the active front row.
- Keep digging up to the Key near the top-left — clearing its tile flies the Key over to shatter the right-side Lock.
Manage the Connected Boxes
- Breaking the Lock exposes Purple, Light Blue and Purple on the right, and Connected Boxes drop into the lower rows.
- Clear the front-line blockers first — Dark Grey is usually in the way.
- Feed the Purple Connected chain from the right side, then the Light Blue chain the same way.
- Keep the belt lean; the chains drag their twins forward, so don't overload while the animation plays.
Clear the final hidden grids
- Open the top-right 3x3 Hidden grid by tapping its bottom row.
- Watch for Light Pink, Yellow and Blue Boxes — don't pull Light Pink until its Box is front.
- Snipe the loose Light Pink and Dark Grey on the far left as their Boxes appear.
- Never carry more than three unmatched marbles, and finish the Yellow and Red Boxes to win.
Tips & tricks
- Feed the front row only from the left side until the Key drops — the right side is off-limits.
- Hold the Green until the Light Blue Box clears, since the Green stack hides right behind it.
- After the Lock breaks, clear the front-line blockers before the Connected chains.
Common mistakes
- Tapping the right side early — Orange and Green have no Box while the Lock is up, so they clog the belt.
- Pulling a colour that doesn't land in the front row, filling the belt before the Key drops.
Marble Sort Level 99 FAQ
Why does my Conveyor Belt flood on Marble Sort Level 99?
You pulled from the right side or grabbed a colour that doesn't land in the front row. The belt blocks and the Key stays out of reach.
Which color do I clear first on Marble Sort Level 99?
The Light Blue on the bottom edge of the left tower into the far-left Box, then the Red into column three.
How many moves does it take to clear Marble Sort Level 99?
Three phases — the left-side dig to the Key, the Purple and Light Blue chains, then the right-side hidden grid. A methodical dozen-plus taps.
Do I need boosters to beat Marble Sort Level 99?
No. Excavate the left side to the Key and the Lock breaks itself. Boosters won't pull the Key down for you.
What happens if I tap the right side early on Marble Sort Level 99?
The Orange and Green have no Box while the Lock is up, so they sit on the belt and you can't reach the Key.
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