Thirteen seconds per attempt. Your last four runs return as replay ghosts: coordinate with your own echoes to hold switches, open gates and break into the memory core. A complete WebGL time-loop puzzle with keyboard and touch controls. Source: https://github.com/bencoder/js13k-2019 (MIT).

backtrace-thirteen-seconds.skillsafe.ai

Run app here

PricingCompletely free

Security scanClean — skill and frontend scanned

Source bencoder/js13k-2019

Created2026-10-26

Updated2026-10-26

Every public app is built from a security-scanned skill and must pass a clean scan — skill and frontend — before it can be listed. Have a skill of your own? Turn it into an app — or read the step-by-step walkthrough.