How many balls does the recorded Level 524 solution use?

It uses 22 of 24 balls, leaving only 2 at the clear.

Which part of the wall should collapse first?

Open the lower-right compartment so its cyan beam and red blocks fall away before attacking the center.

Each opened compartment removes a side support, leaving the next red-cyan stack balanced around the remaining brown posts.

Smash Fest! level guide

expert Target: 22 moves 5 colors

Collapse the cyan-and-red compartment wall from the lower right, dismantle its narrowed center, and finish with 22 fired balls.

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Break the lower-right orange support and the adjacent cyan block.
Open the right compartment until its long cyan beam swings diagonally out of the wall.
Wait for the right-side red rounds and cyan blocks to settle or fall away.
Strike the exposed lower center, removing orange target crates beneath the cyan-red grid.
Work upward through the narrowed center stack while leaving moving debris alone.
Break the support beside the remaining tall brown post and let both side piles collapse.
Clear the short central column of alternating cyan and red blocks.
Sweep the stationary orange crates and cyan pieces from the platform, leaving isolated edges for last.
Fire the final cleanup shot and wait for the clear with 2 balls remaining.

Colors in this level:

Cyan, Red, Orange, Brown, Blue

Firing into the center grid before opening the right compartment leaves the brown posts and base row intact.
Chasing a cyan beam while it slides down the side wastes one of the run's two spare balls.

Start beneath the right compartment, not in the bright red center.
Wait for each diagonal cyan beam to finish sliding before choosing the next support.
Save shots for stationary orange base crates after the central tower falls.

Board notes 5 details

Layout: Cyan ice blocks, red rounds, orange target crates, long cyan pieces, and four tall brown posts form a wide compartment wall.
Goal: Release the right compartment, cascade through the center, and remove the final brown post and low orange supports.
Opening: Break the lower-right cyan and orange supports so the first long cyan piece swings diagonally out.
Danger Zone: Center hits only chip the packed red-cyan grid while all four rigid brown posts remain standing.
Mechanics: A right-to-left compartment cascade repeatedly condenses the broad wall into a narrower central tower.

How many balls does the recorded Level 524 solution use?
It uses 22 of 24 balls, leaving only 2 at the clear.
Which part of the wall should collapse first?
Open the lower-right compartment so its cyan beam and red blocks fall away before attacking the center.
Why does the wall keep becoming narrower?
Each opened compartment removes a side support, leaving the next red-cyan stack balanced around the remaining brown posts.