Reflex Rush is a five-round reaction game. Each round waits a random length of time, then turns green. Your job is to respond as soon as the green signal appears — and not before.
How a round works
- After you press Start, round 1 begins immediately. There is no separate countdown.
- While the play area says Wait for green…, a random delay between 1,000 ms and 2,500 ms runs.
- When the area turns green and shows NOW!, reaction timing starts.
- You have up to 1,500 ms to respond. After each round, a short result flash appears, then the next round begins until all five are done.
A full run always includes five rounds, even if some rounds score zero.
How scoring works
For a valid reaction, the game rounds your reaction time to whole milliseconds, then scores:
round score = max(0, 1000 − reactionMs)
- A perfect instant reaction would be worth 1,000 points.
- Slower reactions score less. At 1,000 ms or slower (within the valid window), the round score is 0, but the reaction still counts toward your average.
- Your run total is the sum of five round scores, from 0 to 5,000.
Your personal best is the highest total. Higher is better.
False starts and too-slow rounds
Two failures both score 0 for that round:
- False start — you activate the reaction area before green. That round ends immediately; green never appears for that round.
- Too slow — green appears, but you do not respond within 1,500 ms.
False starts and too-slow rounds do not count toward average reaction time. Only valid reactions do. If a run has no valid reactions, the result shows No valid reactions instead of a broken average.
Practical tips
- Treat waiting as the main skill. Predicting a fixed rhythm usually causes false starts because the delay is random.
- Prefer a single decisive press after green. Extra presses during the result flash do not help the next round.
- On desktop, keep focus on the reaction button so Enter or Space can register promptly when green appears.
- Switching away from the tab mid-run cancels the game and does not update your personal best.
When you are ready, open Reflex Rush and try a clean five-round run.