What is hidden inside the white-and-red cage?

Yellow star pieces and narrow dark-blue posts sit between the outer shell and the upper stack; breaking the lower-right dark-blue brace exposes them.

Why does the route begin on the lower-right side?

That dark-blue brace releases the right shell and opens the lower cage before the narrow upper stack is attacked.

The late board is reduced to low white-and-red cans and loose striped star balls that must roll off the platform.

Smash Fest! level guide

expert Target: 15 moves 5 colors

Peel the lower-right dark-blue shell from the white-and-red can cage, drop the narrow upper stack, and finish the low can-and-ball cleanup.

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Strike the lower-right dark-blue side brace at the edge of the white-and-red can cage.
Pause while the right-side blocks and cans fall outward, then wait for the lower-right joint to become visible.
Hit the exposed right-to-center seam so the broad lower can cage sheds its outer row.
Use the opened lower gap to break the support beneath the narrow upper dark-blue stack.
Let the upper blocks, side target cans, and loose striped balls finish dropping before the next shot.
Clear the remaining left dark-blue post and the white-and-red can rows across the lower platform.
Remove the low cans and any star ball that has stopped against the platform edge.
Wait for the last round debris to leave the platform; the clear appears with 10 balls remaining.

Colors in this level:

Dark-blue, White, Red, Yellow, Blue

Firing at the upper dark-blue blocks first leaves the lower cage closed and spends shots without creating the right-side escape route.
Chasing a moving striped ball before the can rows settle can hide the support that still holds the upper stack.

Use the lower-right dark-blue side brace as the release point instead of the upper block face.
Pause while the right shell and white-and-red cans fall so the next lower support is visible.
Clear stopped cans and star balls only after the upper tower has lost its support.

Board notes 5 details

Layout: A broad lower cage of white cans with red bands and yellow stars sits between dark-blue side posts, with a narrow upper stack of dark-blue blocks and side target cans.
Goal: Remove the side shell, topple the upper dark-blue tower, and clear the exposed can rows and striped star balls from the platform.
Opening: Strike the lower-right dark-blue brace first so the right shell falls outward and exposes the lower cage.
Danger Zone: Shooting the upper dark-blue pair before the right shell opens leaves the lower cage braced, while chasing rolling star balls hides the next lower joint.
Mechanics: An asymmetric shell-peel collapse opens on the right, drops the upper tower through the exposed gap, and ends with rolling can cleanup.

What is hidden inside the white-and-red cage?
Yellow star pieces and narrow dark-blue posts sit between the outer shell and the upper stack; breaking the lower-right dark-blue brace exposes them.
Why does the route begin on the lower-right side?
That dark-blue brace releases the right shell and opens the lower cage before the narrow upper stack is attacked.
What remains during the final cleanup?
The late board is reduced to low white-and-red cans and loose striped star balls that must roll off the platform.