How many balls does the Level 566 clear use?

It uses 24 of the 28 balls and leaves 4 in reserve.

Which side should open first in Level 566?

Start at the upper-right roof and right wall so the purple core can spill out through that side.

The orange shell is still pinning the purple core, so surface shots do not remove the real supports.

Smash Fest! level guide

expert Target: 24 moves 4 colors

Peel the right orange shell off the tower, spill the purple core, and finish the collapsing cage with 24 fired balls.

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Break the upper-right roof corner and the short orange upright below it.
Keep hitting the right wall so the top orange bars and first purple side pieces spill outward.
Pause while the crown debris falls, then remove the next right-side rib holding the central purple cluster in place.
Chip through the upper middle frame so the roof slab starts leaning left instead of locking the core.
Clear the remaining right capsule bank and let the middle purple stack burst through the open side.
Shoot the leaning orange roof and exposed midsection again until the structure collapses around the pedestal.
Finish the last orange platform strip and any lone purple survivor on the left edge; leave 4 balls.

Colors in this level:

Orange, Purple, Blue, Red

Working on the left wall before the right shell has opened.
Firing again while the spilled right-side debris is still bouncing through the middle.

Board notes 5 details

Layout: An orange fortress with a broad roof hides thick purple capsule banks on both sides and a central purple cluster behind narrow orange ribs.
Goal: Open the right side, free the trapped purple core, and knock the remaining roof and pedestal pieces off the platform.
Opening: Break the upper-right roof corner and right wall first so the crown and right capsule bank can spill outward.
Danger Zone: Shooting the left wall too early wastes balls because the right shell still pins the purple core inside the cage.
Mechanics: A shell-peel collapse where exposed purple weight drags the rest of the orange frame down.

How many balls does the Level 566 clear use?
It uses 24 of the 28 balls and leaves 4 in reserve.
Which side should open first in Level 566?
Start at the upper-right roof and right wall so the purple core can spill out through that side.
Why does the middle stay intact when I shoot the front?
The orange shell is still pinning the purple core, so surface shots do not remove the real supports.