Limit the first network
Draw a compact map with two entrances, two destinations, and one crossing where routes could conflict. Decide whether vehicles follow fixed lanes, obey a signal, or use a path the player draws; do not mix these control schemes in the first puzzle. Show destination markers and make the collision or queue rule visible before a level begins.
Paste-ready concept prompt
Original concept prompt: “Build a single-player traffic-routing puzzle on a fixed top-down grid. Cars enter from marked roads and need to reach matching colored destinations. Let me tap a junction to cycle its signal between north-south and east-west; cars stop at red signals and move one road segment at a time. Deliver all three cars without a collision or a queue blocking an entrance. A collision or blocked entrance ends the round. Show the next car's destination before it reaches the junction, and include Restart to replay the same traffic schedule. Start with one junction and add no timers until the route rule is clear.” This is a proposed prompt to test, not an available named game.
Check the schedule and the consequence
Replay the same level while switching the signal early, at the junction, and after a car has passed. Confirm a signal change cannot teleport a car or reverse its destination. Test a deliberate collision and a deliberate queue to ensure both produce the stated failure condition and a clear restart.
Ask a tester to predict which car should move before they tap. If a hidden timer or unreadable road marking causes the failure, fix that cue before making traffic faster. Once the route is understandable, add one new junction or vehicle type per iteration so you can tell which new rule made the puzzle harder.
Questions about traffic routing game prompt
Should the player control each car separately?
Not in the first version. A single junction control lets the puzzle focus on sequencing. Per-car controls add input bookkeeping and make it harder to see whether planning or handling is the challenge.
What is a fair failure condition?
Choose an observable event such as a collision or a blocked entrance, explain it before play, and allow the same schedule to be restarted so the player can test a new signal plan.