ONE BUTTON GRAVITY ARCADE

Graveler

Ride a shifting tunnel. Hold to reverse gravity, release to drop back, collect coins, and dodge the red spikes.

Your runner moves forward automatically. Time each hold to pull toward the upper wall, then release to drift toward the lower wall. Chain yellow coins for a growing score. Avoid the blue tunnel walls and red spikes; tap to retry.

Adapted from ABA Games’ GRAVELER sample · MIT license. GitHub source and license included.