How many balls does Level 597 use?

It uses 18 of the 22 balls and leaves 4 remaining.

Which part of the wall should break first?

Start with the orange shelf under the top-left purple pile so the upper load spills across the board.

The late white-blue block and orange crate on the tilted left table can survive after the main wall has already fallen.

Smash Fest! level guide

expert Target: 18 moves 5 colors

Dump the left purple shelf pile, drain the can curtain, and finish the two-table remainder in 18 shots.

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Hit the orange shelf under the top-left purple pile so that whole upper cluster starts spilling.
Keep widening the left break and let the falling purple pots and cans drag the upper canopy into the center.
Shoot the exposed middle-left shelves and can rows while the broad wall shrinks to a much lower platform.
Switch to the remaining right shelf and remove the last cans and plank pieces still standing on that table.
Finish the late white-blue block and lone orange crate resting on the tilted left table, leaving 4 balls in reserve.

Colors in this level:

Orange, Yellow, Pink, Purple, Blue

Drilling the bottom crate wall before the top-left shelf has broken.
Stopping after the canopy falls while the tilted left table still holds one block and one crate.

Open the top-left shelf before worrying about the crate base.
Let the purple pots and cans drag the middle rows down for you.
Do not leave the tilted left table until the late white-blue block and crate are both gone.

Board notes 5 details

Layout: A wide wall combines an orange crate base, dense yellow-and-pink can rows, three orange upper shelves, a heavy purple pile on the top left, and a smaller purple stack on the top right.
Goal: Break the left upper shelf so the top load spills, then shrink the canopy to a low two-table remainder and remove the late white-blue block and orange crate.
Opening: Fire into the orange shelf directly under the top-left purple pile instead of the bottom crate band.
Danger Zone: Bottom-first shots keep the whole canopy intact, and the wall still is not finished when one white-blue block and one orange crate remain on the tilted left table.
Mechanics: An overstuffed shelf-avalanche board where one broken upper shelf turns the entire can curtain into a chain collapse.

How many balls does Level 597 use?
It uses 18 of the 22 balls and leaves 4 remaining.
Which part of the wall should break first?
Start with the orange shelf under the top-left purple pile so the upper load spills across the board.
What usually survives too long on Level 597?
The late white-blue block and orange crate on the tilted left table can survive after the main wall has already fallen.