How many balls does the Level 526 walkthrough fire?

It fires 18 of the starting 28 balls and clears with 10 remaining.

Which piece should I hit first?

Start with the overhanging upper-right red-and-cyan brace, then attack the exposed right support.

The roof collapse does not remove the cage frame; break the gray crossbars and then target each stationary cyan column base.

Smash Fest! level guide

expert Target: 18 moves 5 colors

Peel open the overhanging right side of the five-column cyan cage, break its gray crossbars, and clear the remaining columns with 18 fired balls.

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Fire into the upper-right red-and-cyan brace so the first roof cylinders fall outward.
Break the newly exposed right cyan side support and let the right wall peel away.
Strike the right ends of the upper and lower gray crossbars to release the middle blocks.
Remove the exposed right-center cyan column, then pause while gray cubes and colored cylinders tumble.
Work across the remaining tall cyan columns from right to left, aiming at stationary bases.
Clear the last left roof pieces and final cyan column; the recorded run finishes with 10 balls.

Colors in this level:

Cyan, Gray, Red, Gold, Blue

Shooting the colorful roof before the upper-right brace opens spends balls without releasing the cage.
Chasing rolling cylinders hides the stable cyan supports and wastes cleanup shots.

Open the overhanging upper-right brace before touching the center of the roof.
Break the right ends of both gray crossbars while they are exposed and stationary.
Wait for the colored cylinders to roll clear, then work across the cyan columns from right to left.

Board notes 5 details

Layout: Five tall pale-cyan columns support two gray crossbars and a crowded roof of red, gold, blue, and cyan pieces; the upper-right load hangs beyond the rectangular cage.
Goal: Drop the colorful roof, remove both gray shelf bars, and knock every tall cyan column and stationary roof piece off the platform.
Opening: Hit the upper-right red-and-cyan brace first, then follow the peeled edge down into the exposed right cyan support and crossbar ends.
Danger Zone: Do not chase the top cylinders once they begin rolling; the fixed gray bars and cyan columns beneath them are what keep the cage standing.
Mechanics: A right-to-left cage peel changes into individual column cleanup after the cylinder roof collapses.

How many balls does the Level 526 walkthrough fire?
It fires 18 of the starting 28 balls and clears with 10 remaining.
Which piece should I hit first?
Start with the overhanging upper-right red-and-cyan brace, then attack the exposed right support.
Why are tall cyan columns still standing after the roof falls?
The roof collapse does not remove the cage frame; break the gray crossbars and then target each stationary cyan column base.