OpenPlay Football is an educational football strategy simulator. You are not playing a physics video game. You are learning why a play works: the concept, the coverage, the read, and the decision. The loop is simple. Pick two fictional teams. Lock an offensive concept while the defense stays hidden. Watch assignments develop on a 3D field. Pause at one football decision. See whether the decision was sound — even if the yards were not. What is included in this build: Run a Drive — one offensive possession from your own 35, about 3–5 minutes Challenge Lab — 45 replayable situations across coverage, pressure, run lanes, third down, and the red zone Three difficulties — beginner guidance through advanced reads Play creator — save a concept locally and test it in a live drive Coach Riley Grant — plain-language answers about plays and coverages Playbook and Learn — 11 offensive concepts, 8 defensive calls, and short guides on downs, field position, and personnel Saved progress — mastery, daily challenge, and achievements in your browser (no account required) How scoring works: the lab grades the quality of the decision (best, reasonable, risky, poor), not yards alone. A good read can still lose yards. A lucky bounce can still be a bad call. What this is not: it is not an NFL-licensed game, not a full 11-on-11 physics sim, and not Coach Studio. Teams and rosters are fictional. Demo Schema v0.1 is experimental. Who it is for: fans who want to understand the game, players learning reads, and coaches who want a clean way to walk a concept. No playbook fluency required to start.