How many balls does Smash Fest Level 293 start with?

It starts with 24 balls, and the demonstrated clear uses 18 of them.

What should you destroy before the purple core?

Remove the orange roof and both star-studded side walls so the cylinders have room to spill away.

Low purple pinwheel pieces and small blue cylinders remain along the platform after the tall column falls.

Smash Fest! level guide

expert Target: 18 moves 4 colors

Strip the orange star-crate shell from Smash Fest Level 293 before peeling its purple pinwheel tier and blue cylinder base down to an empty rail.

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Hit the upper-right orange roof corner and dislodge the top shell pieces.
Break the right orange wall so that side of the frame slides away.
Strike the remaining upper orange cap and wait for it to fall clear.
Open the left orange wall instead of firing through the protected center.
Remove the orange base and leaning shell pieces still bracing the core.
Peel the exposed purple top tier from its right shoulder.
Shorten the tall purple column and uncover the blue cylinders beneath it.
Clear the blue lower band, then sweep the horizontal purple pinwheel pieces from the rail.
Finish the small purple and blue cylinders near the platform edges.

Colors in this level:

Orange, Purple, Blue, Red

Shooting the colorful core before opening the orange shell spends balls against pieces that cannot fall freely.
Ignoring the flat pinwheel cylinders along the rail leaves the level unfinished after the tall stacks disappear.

Let each falling orange wall drag loose cylinders off the rail before choosing another target.
Check the platform line for horizontal pinwheel pieces after the tall purple column is gone.

Board notes 5 details

Layout: An orange star-studded roof, side walls, and base surround a dense purple-and-blue round-ended core, with 24 balls in the cannon.
Goal: Remove the orange armor first, then clear the tall purple column, blue lower band, and flat pinwheel cylinders left on the platform.
Opening: Break the upper-right orange roof corner and right wall, then open the opposite shell before attacking the protected core.
Danger Zone: Center hits against the intact crate frame waste impacts, and the flat pinwheel pieces can be overlooked after the tall core collapses.
Mechanics: Three visible demolition layers must be handled in order—orange shell, purple pinwheel tier, and blue cylinder base.

How many balls does Smash Fest Level 293 start with?
It starts with 24 balls, and the demonstrated clear uses 18 of them.
What should you destroy before the purple core?
Remove the orange roof and both star-studded side walls so the cylinders have room to spill away.
Which pinwheel and cylinder pieces remain after the tall column falls?
Low purple pinwheel pieces and small blue cylinders remain along the platform after the tall column falls.