Electron Stream

You are a line of charge crossing a circuit board that never ends — the screen wraps, so reaching the right edge starts another lap and raises the multiplier. Hold to pull upward, release and it sinks. Reverse currents sweep in from the right, and every one you clip shortens the stream a little more.

There is no health bar. The stream’s own length is the health bar, and when it is gone the run is over.

From Kenta Cho’s MIT-licensed crisp-game-lib collection.