Is the chained door the target in Level 18?

No. The prompt is 'Reach the ceiling,' and touching the ceiling completes the level before any door interaction.

What causes the victory state?

A centered upward jump that reaches the top boundary triggers the victory overlay.

Mr Potato level guide

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Ignore the chained door, make a centered vertical jump, and touch the ceiling to trigger the Level 18 victory state.

Layout: Mr Potato starts on a flat floor. A chained arched door is visible at the far right, but there are no intermediate platforms or keys in the open space above the floor.
Goal: Reach the ceiling at the top boundary of the play area.
Opening: Stay on the floor and position the potato below the open ceiling instead of walking toward the door.
Danger Zone: The chained door is a distraction rather than the route; horizontal movement away from the center makes the vertical ceiling jump less reliable.
Mechanics: Touching the ceiling completes the level immediately and produces the victory overlay; no key or door interaction is required.

Center Mr Potato under the open space and stop horizontal movement before pressing up.
The ceiling is the trigger in this level; do not spend the attempt trying to unlock the door.
If the board feels stuck, look for the color with the cleanest path and use that to regain space.

Leave Mr Potato on the flat floor and move only enough to center him under the open area.
Stop horizontal input so the jump does not drift away from the ceiling route.
Press the up control to launch the potato vertically.
Keep the jump aligned until Mr Potato touches the ceiling at the top of the screen.
Wait for the victory overlay that appears immediately after the ceiling trigger.

Walking toward the chained door because it looks like the normal target.
Holding a horizontal direction during the vertical jump and missing the ceiling trigger.

Is the chained door the target in Level 18?
No. The prompt is 'Reach the ceiling,' and touching the ceiling completes the level before any door interaction.
What causes the victory state?
A centered upward jump that reaches the top boundary triggers the victory overlay.