How do I recover if only the tall left rocket column remains?

Stop firing at the fallen right pile and break the upper orange crates on the standing left column; its rockets will then tip away.

Why start at the upper right?

That edge braces the purple core and the rocket-topped upper wall; removing it starts the useful leftward topple.

A low row of blue droplet blocks and cyan foundation cubes remains across the platform.

Smash Fest! level guide

expert Target: 25 moves 6 colors

Peel the rocket-topped orange wall from the upper right, topple its purple core, and sweep the blue-and-cyan foundation with 25 fired balls.

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Strike the upper-right orange star crates beside the rightmost rocket cylinder.
Break the orange crate directly below that rocket to expose the purple upper-right corner of the core.
Hit the exposed purple corner and orange crate below it; the whole right half folds onto the blue rows.
Break the exposed upper-center crates and let the remaining tall left rocket column settle.
Remove the standing left star-crate column, then wait for the rockets and rings to roll away.
Sweep the blue droplet blocks above the cyan base from right toward left.
Clear the isolated cyan foundation cubes; the run finishes with 2 balls.

Colors in this level:

Orange, Purple, Red, White, Blue, Cyan

Firing into the purple center before opening the right edge leaves it boxed inside the orange wall.
Stopping after the tall wall falls leaves cyan foundation cubes spread across the platform.

Board notes 5 details

Layout: An orange star-crate rectangle surrounds a purple center; six red-and-white rocket cylinders sit four across the top plus one on each side, above blue droplet blocks and a cyan ice foundation.
Goal: Open the right edge, topple the tall wall leftward, and remove every blue and cyan foundation block left on the platform.
Opening: Break the upper-right orange crates beside the rightmost rocket, then continue down that edge until the purple center loses its brace.
Danger Zone: Do not shoot through falling rockets, rings, or star crates; after the tower drops, the long cyan foundation still requires a deliberate sweep.
Mechanics: A right-edge peel turns a tall rocket-capped wall into a low cleanup of blue droplet cubes and cyan ice blocks.

How do I recover if only the tall left rocket column remains?
Stop firing at the fallen right pile and break the upper orange crates on the standing left column; its rockets will then tip away.
Why start at the upper right?
That edge braces the purple core and the rocket-topped upper wall; removing it starts the useful leftward topple.
What remains after the tower falls?
A low row of blue droplet blocks and cyan foundation cubes remains across the platform.