Horizon Dash

Horizon Dash is a community-engineered HTML5 synthwave endless runner inspired by the Horizon Chase aesthetic — not an official release from Epic Games or Aquiris, but a fan-built browser engine. Forward velocity scales by 2.5% every 10 seconds of sustained survival, compressing the lane-shift window from 8 frames at Phase 1 down to 3 frames at Phase 3 Hyper Dash. A single pixel overlap with any obstacle is instant permadeath. The engine runs at 60fps on under 12MB of runtime memory.

At Phase 3 speed, reactive lane shifts are physically too slow — the only viable technique is pre-emptive reading of the neon grid frequency patterns in the far background, which encode the current obstacle approach speed 2–3 seconds before anything enters the near field. The engine caches a single secondary command within a 3-frame buffer window before the current shift animation completes, enabling a snake-like double lane cut for closely-spaced double-obstacle walls — the only way to survive back-to-back walls at Hyper Dash speed.