In need of stimulation? Solve the puzzles of ON/OFF and turn ON your brain! But beware! Our puzzles are very tricky and finish the whole game will be extremely challenging!

What's New

Version 2.1

Minor fixes + 64-bit

Ratings and Reviews

4.2 out of 5

22 Ratings

22 Ratings

Perfectly addictive!

nicky name nickname

This game is nicely designed and has smooth, nicely addictive gameplay! The levels are colourful and clever, and give you a great sense of achievement when completed. This is my favourite puzzle game on the AppStore I think! People moan about having to pay for more levels, but there are no ads, even before paying, and you have got to give them something in return for such a fantastic game. - trisnpod

Good, but…


Very good concept, lovely minimalist if design and a very clean set of colours that make a very enjoyable gameplay, however, with only 40 levels without unlocking more with in-app purchases it feels like a lite version of a full app. I would have preferred a lite app with those 20 levels and another app that unlocks all levels for no more than £2.

But, worth a play, even if you do complete all of the standard levels in under 2 hours.

Very good


Very good game. Nice user interface by swiping through the menu screens and simple game controls.

I was a little disappointed to see that extra level packs had to be purchased but I enjoyed the first two worlds enough that I think I'll go for another 3 for just £0.69!

I think there should be a "fewest moves" type challenge mode, as I racked up over 100 moves on some levels trying to get it right and it would give the game more of a "replayable" feel by getting you to go back and improve on the solutions.

All in all, very simple and yet very enjoyable. Would recommend and have recommended.


1Button SARL
7.5 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad and iPod touch.
English, French
Age Rating
Rated 4+
© 1Button 2012
In-App Purchases
  1. 5-Key Pack £0.99


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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