Game rules · Motor control
Line Tracer
A seeded corridor snakes down the field, narrowing as it goes. Trace it clean and fast.
The run
How it plays
- Progress only counts along the corridor — no shortcuts, no teleports.
- Wall touches are rate-limited (max one per 300ms) but expensive.
- Both players trace the identical corridor.
Motor control · 60s runs
Scoring formula · versioned
Every point, accounted for
Integer arithmetic only — the same result on every device, every time. Changing any number creates a new scoring version; old results never change.
| Component | Condition | Points |
|---|---|---|
| Progress | continuous distance along the corridor | up to +1,500 |
| Wall touch | leaving the corridor mid-stroke | −30 |
| Finish bonus | reaching the end | +500 |
| Time bonus | per second remaining at the finish | +10/s |
Fairness
Chance never picks the winner
The challenge is sealed and identical for both players — variety without advantage. Every official score is replayed and verified on the server.
Deterministic challengesServer-replayed scoresNo random tie-breaks