About Reaction Grid
Reaction Grid is a go/no-go reflex test. Squares light up one at a time on a three-by-three grid. Green means tap, red means do not. The squares disappear faster as levels progress and later levels can show two lights at once.
How to play
- Tap green squares as soon as they light up.
- Never tap a red square. It costs a life.
- Missing four green squares ends the run.
Tips and strategy
- Decide on the colour first, then move.
- Keep your eyes on the centre of the grid.
- If you are unsure, do not tap.
Levels, stars and XP
Finish a level to earn one to three stars and XP towards your player level. Replay any unlocked level to improve your stars. From level 151 the game enters endless mode, where each level is a remix of an earlier one with fresh colours and a slightly higher difficulty.
Frequently asked questions
- How do I play Reaction Grid?
- Tap green squares as soon as they light up. Never tap a red square. It costs a life. Missing four green squares ends the run.
- What is a good strategy for Reaction Grid?
- Decide on the colour first, then move.
- How many levels does Reaction Grid have?
- Reaction Grid has 150 levels that rise gradually in difficulty. After level 150 the game continues without end: levels are drawn from the first 150 in a newly shuffled order, with new colours, flipped or rotated layouts and a small difficulty boost, so the level number keeps increasing.
- Is it free to play?
- Yes. Reaction Grid is completely free and runs in your browser on phones, tablets and computers. No download or account is needed.
- Does my progress save?
- Your level, stars and XP are saved in your browser on this device. Clearing your site data will reset them.