What does the signal control in Level 16?

It provides the level's stop/go timing rule: make the committed crossing while it is green and pause during the dark/red state.

Where is the actual target in Level 16?

The target is the arched door on the raised platform at the far right, not the hanging signal.

Mr Potato level guide

hard 2 colors

Follow the hanging traffic signal from the left start platform, cross the lower floor on green, and jump to the raised right-hand door.

Layout: Mr Potato starts on a small floating platform at the left. A long lower floor runs toward a raised right platform with an arched door, and a hanging traffic signal controls the route near the middle.
Goal: Reach the raised platform at the far right and enter the arched door.
Opening: Move right off the small starting platform, land on the lower floor, and use it as the staging lane for the final jump.
Danger Zone: The signal changes between green and a dark/red stop state while the potato is crossing; the raised right platform also requires a committed jump.
Mechanics: The hanging traffic-light-style signal is a timing gate: advance during green and pause during the dark/red state.

Use the long lower floor as a safe staging area and wait for green before the final rightward jump.
Do not hold right through the dark/red signal; let the potato settle before committing to the door platform.
Think in chain clears. The best move is the one that sets up the next two moves, not just the quickest current match.

Move right from the left floating platform and land on the long lower floor.
Stay on the lower floor while watching the hanging signal above the middle of the route.
When the signal is green, hold right and press up to clear the approach to the raised platform.
If the signal turns dark/red, stop and wait rather than forcing a crossing.
Land on the raised right platform and walk into the arched door.

Colors in this level:

Green, Red

Trying to make the long door-platform jump while the signal is dark/red.
Leaving the starting platform without using the lower floor to line up the final jump.

What does the signal control in Level 16?
It provides the level's stop/go timing rule: make the committed crossing while it is green and pause during the dark/red state.
Where is the actual target in Level 16?
The target is the arched door on the raised platform at the far right, not the hanging signal.