How do I solve Game Is Hard Level 213?

Stretch the cyan square outward from the lower-right corner until every ball is outside the box.

Why does dragging the balls take so long in Level 213?

Because the real trick is moving the box walls. Once the frame shifts away from the balls, the container counts as empty.

Game Is Hard level guide

medium

Game Is Hard Level 213 is a frame-expansion trick. Stretch the cyan square outward until every cyan ball is left outside the box.

If the player asks you to sign in, open the video on YouTube instead.

Read `empty the box.` and inspect the cyan balls sitting inside the square frame.
Ignore the bait of dragging each ball out separately.
Grab the lower-right corner of the square.
Drag that corner outward so the frame expands and the balls are left outside the moving border.
Keep stretching until the inside of the box is empty, then release for the clear.

Trying to flick every cyan ball out by hand.
Letting go before the border has moved far enough that no ball remains inside it.

Move the box, not the balls.
Stretch from the lower-right corner.
If the board feels stuck, look for the color with the cleanest path and use that to regain space.

Board notes 5 details

Layout: Level 213 says `empty the box.` above a cyan square container holding several cyan balls inside its borders.
Goal: Leave no cyan balls inside the square.
Opening: Grab the lower-right corner of the square and enlarge the frame instead of dragging the balls one by one.
Danger Zone: Manual ball dragging is the decoy. The level clears faster when you move the walls and let the balls end up outside the border.
Mechanics: Box-resize empty-container trick puzzle.

How do I solve Game Is Hard Level 213?
Stretch the cyan square outward from the lower-right corner until every ball is outside the box.
Why does dragging the balls take so long in Level 213?
Because the real trick is moving the box walls. Once the frame shifts away from the balls, the container counts as empty.