Reaction Reactor.

How to play

Wait until the reactor turns green, then press Space or tap REACT. Complete five rounds. Early presses count as 1,000 ms. Lower reaction times earn higher scores.

Every score has a story.

A run qualifies for XP at 500 points and at least 3 seconds of gameplay. Finish the game to submit your run. Replays are checked on the server; suspicious scores stay off the leaderboard.

Press P or Escape to pause. Leaving the page abandons an unfinished run. Sessions expire after 10 minutes.