How many balls does the Level 501 solution fire?

It fires 18 of the starting 25 balls and finishes with 7 remaining.

Which part of the castle should break first?

Break the upper-right orange roof support, then work down that exposed side.

The slanted white panels and several gray blocks continue sliding after the right wall opens, so wait for them before spending another ball.

Smash Fest! level guide

expert Target: 18 moves 5 colors

Peel the five-peaked castle open from the upper right, collapse its white-and-gray inner shell, and clear the low orange frame with 18 fired balls.

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Break the upper-right orange roof support to start peeling away the right tower.
Continue through the exposed right-side orange crates and wait for the white panels to swing outward.
Strike the upper-center frame so the gray and red inner pieces settle onto the lower platform.
Remove the remaining left and center orange supports only after the tall shell finishes leaning.
Break the orange base beam that still joins the left and center piles.
Clear the low white panels and orange star crates, targeting stationary pieces instead of rolling debris.
Finish the isolated red and gray remnants; the clear triggers with 7 balls remaining.

Colors in this level:

Orange, White, Gray, Red, Blue

Opening through the center leaves the five-peaked shell braced on both sides.
Firing at leaning white panels wastes balls that are needed for the low orange frame.

Board notes 5 details

Layout: A broad orange star-crate castle has five roof peaks, white red-dotted panels, gray inner blocks, red pieces, and a dense lower frame spanning the platform.
Goal: Open the right tower, release the slanted inner shell, and remove the last orange, white, red, and gray pieces from the platform.
Opening: Strike the upper-right orange roof support first, then continue down the exposed right frame so the white panels hinge outward.
Danger Zone: Do not fire into the dense center while both side walls still stand; wait whenever the white panels and gray blocks are sliding.
Mechanics: A right-to-left castle-shell collapse turns a full-width wall into a low framed cleanup.

How many balls does the Level 501 solution fire?
It fires 18 of the starting 25 balls and finishes with 7 remaining.
Which part of the castle should break first?
Break the upper-right orange roof support, then work down that exposed side.
Which pieces can leave the platform without a direct cleanup shot?
The slanted white panels and several gray blocks continue sliding after the right wall opens, so wait for them before spending another ball.