What is the orange-brown stem above the arch?

It is covered structure. Wait for the target route to expose its removable phase instead of tapping it as a shortcut.

Why does the gray arch remain after the colors clear?

The arch is part of the board's final structural phase. Clear its remaining target pieces and wait for the checkmark.

Cube Tap Sort level guide

hard 12 colors

Open Level 29's multicolored core inside the gray arch from gray and cyan, then clear the final structural pieces.

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From the exposed opening inside the arch, clear gray 1 and cyan 1.
After the arch re-presents automatically, follow the red/green and yellow/pink groups in the inner core.
As the core separates, take blue from the inner opening, then purple and orange from the lower core sections named by the row.
Keep the covered top stem and gray arch out of the buffer plan until their boxes are active; the center looking empty is not a completion signal.
When the structural row appears, clear the top stem first and the remaining gray arch pieces around the opening, then wait for WELL DONE.

Colors in this level:

Gray, Cyan, Red, Green, Yellow, Pink, Blue, Purple, Orange, Peach, Lavender, Lime

Start with gray 1 and cyan 1 from the exposed opening inside the arch.
After the arch shifts automatically, follow the red/green and yellow/pink groups in the inner core.
Leave the covered top stem and gray frame alone until their target phases appear.

Board notes 5 details

Layout: The opening board is a gray arch around a compact multicolored core with an orange-brown covered stem above it. Gray 1 and cyan 1 are active, and the buffer row is empty.
Goal: Advance through red, green, yellow, pink, blue, purple, and orange before clearing the remaining gray/cyan frame pieces.
Opening: Clear the exposed gray 1 and cyan 1 faces through the arch opening.
Danger Zone: The gray arch controls access to the inner core, while the orange-brown top stem is cover and late structural pieces can remain after the center contracts.
Mechanics: A covered arch frame surrounds a colored core that re-presents automatically through several compact shapes before the frame clears; no manual swipe is introduced. The top stem and arch can remain visible after the inner core looks empty.

What is the orange-brown stem above the arch?
It is covered structure. Wait for the target route to expose its removable phase instead of tapping it as a shortcut.
Why does the gray arch remain after the colors clear?
The arch is part of the board's final structural phase. Clear its remaining target pieces and wait for the checkmark.