An endless runner where you only move on the beat, queue each dodge and let the rhythm fire it.
Time advances in discrete beats. An action you press is queued and only executes on the next beat, so you read the obstacles ahead and commit your moves to the tempo. Hop and switch lanes to thread the incoming hazards; the course is endless and streams new obstacles as you go.
An endless runner crossed with a rhythm game: you move only on the beat, and every dodge is queued to fire on the next one.
That queuing is the original part. Runners are reaction games — see the obstacle, react now. Tying movement to a metronome means your input happens later than your decision, always.
So the skill becomes anticipation with a fixed delay, which is closer to playing an instrument than to dodging. Reacting correctly but late is indistinguishable from reacting wrongly, and that is the whole difficulty.
Echo Beat Runner fuses a neon endless runner with rhythm timing, where the music's pulse, not your reflexes, decides when you move. An original free browser game made in-house at PlayPendium.