How many balls does Level 551 use?

The recorded clear fires 14 of 23 balls and leaves 9.

What should open first on Level 551?

Break the tall left rocket tower and the gray shelf tied into that edge to start the crown collapse.

The right rocket cluster and bumper strip can keep the last striped stub standing if the top has not been peeled away first.

Smash Fest! level guide

expert Target: 14 moves 6 colors

Peel away the stepped crown and side rockets, then strip the lower curtain and base with 14 fired balls.

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Break the tall left orange rocket tower and the gray shelf block above the left edge of the striped curtain.
Keep peeling the left side of the stepped white roof until the upper staircase starts sliding off that side.
Remove the surviving right rocket cluster and the bullseye-faced gray blocks still holding the top shelf level.
Pause while the loose cones and gray pieces finish bouncing off the platform.
Strip the exposed top of the striped curtain and the orange star belt beneath it from left to right.
Clear the central striped columns and the low gray bumper strip under the remaining right-hand stub.
Finish the last striped panel and bullseye-faced block on the right; leave 9 balls.

Colors in this level:

White, Gray, Red, Orange, Yellow, Blue

Drilling into the lower striped curtain before the stepped crown and rocket towers have moved.
Ignoring the right rocket cluster after the left side opens and letting it stay propped on the bumper strip.

Board notes 5 details

Layout: A stepped white-and-red crown rests above a broad gray shelf, a dense striped curtain, and a low gray bumper strip, with orange rocket towers on both flanks.
Goal: Drop the upper staircase and side towers first, then remove the striped middle curtain and the last right-hand base stub.
Opening: Break the tall left rocket tower and the gray shelf pieces tied into that edge so the stepped crown starts sliding away.
Danger Zone: Shooting directly into the lower striped curtain before the top has moved leaves the right side propped on the bumper strip.
Mechanics: A staircase-roof release turns a decorative top half into a compact lower cleanup.

How many balls does Level 551 use?
The recorded clear fires 14 of 23 balls and leaves 9.
What should open first on Level 551?
Break the tall left rocket tower and the gray shelf tied into that edge to start the crown collapse.
Why does the right side keep surviving?
The right rocket cluster and bumper strip can keep the last striped stub standing if the top has not been peeled away first.