SPEED · 1 OF 16 GAMES

FlashA reaction time game

Wait while the card is grey. Tap the moment your target pops up.

Practise Flash or play today's Daily

How to play

  1. Your target is shown at the top.
  2. Wait while the card is grey. Tap the moment your target pops up.

Right and fast scores most. Rounds get harder as you keep getting them right.

About Flash

Flash is a reaction time game with a catch. First you see your target, say a blue star. The card stays grey, then something pops up, and you tap only if it is your target.

Decoys look a lot like the target, so being fast is not enough: you also have to hold back. It plays like a go/no-go reaction test, with a fresh target every round.

Tips for a higher score

  • Keep your thumb just above the screen so every tap is short.
  • Check shape and colour together. A blue square is not a blue star.
  • Never tap early to guess. A tap on a decoy breaks your combo.

More speed games

Sort Each card says sort by colour or by shape. Send it to the matching side. Tally A sum appears. Right or wrong? Tick or cross, quickly. Bigger Two numbers side by side. Tap the larger value, not the bigger print.

All speed games All 16 games

Flash: questions

How do you play Flash?

Your target is shown at the top. Wait while the card is grey. Tap the moment your target pops up.

Is Flash free to play?

Yes. Play Flash free in your browser, with no sign-up and no download. It is also in the free Sharpday app for Android.

Is Flash a reaction time test?

It works like one: you wait, then tap the instant your target appears and ignore the decoys. Sharpday is a game, so treat your score as a personal best to beat rather than a measurement.