0h h1

It's quick in that you can finish a 8x8 grid in probably two to five minutes. It's repetitive, but I keep coming back to it and it's sister game. I'd like to see this expand if possible to maybe add a challenge mode where you get a solved grid, but it contains errors that you have to fix.

On the 12x12 board the left three columns are displayed differently and are different shades of blue and red. Is that normal? If not please fix it, it kinda ruins my focus but overall very fun.

Addictive as hell!!! I played this game on windows phone, now in android it's so much better and im hooked again! Great job guys I'll try your other games too

The form of this game is popular, but have seen many with poor user interface. This one is very solid for one that offers hints.

Addicting. Great time waster. Only issue is sometimes on the higher levels my fat fingers change a color by mistake.

Very addictive. But cannot save a game to continue later...

Fantastic little game! Simple concept and simple gameplay. No ads, and no IAPs is a plus too.

Simple fun, will be come challenge but smooth gradient up difficulty mountain

I've been playing it for months. It's so simple yet so engrossing

Simply awesome game! Glad it has mobile version, not only web

Insanely addictive. Could use achievements for filling in only one color before placing any of the other, and an option to choose which color is one vs two touches would be nice.

One of the BEST logic puzzle games EVER. Instant addiction. Absolutely love it.

It is an interesting little puzzle game, but it could use some sound.

Multiple solutions. Pointless. Sloppy progamming.

MORE Levels pleease!

A truly lovely little logic game. Better on PC, but still great.

Mind Teaser-fun to play

This game is amazing.

Love the game

Love it

I had played other versions of this puzzle but none had been so visually easy to understand. I just wish they would make bigger grids. After a while it starts getting easy. EDIT: New sizes added, review updated, three stars given :)

I enjoyed the game while it worked, but the intermittant crashes I initially experienced have completely taken over causing the game to shutdown and then continuously reload the startup page within moments of opening the program. The game is essentially useless at this point.

Great app!! For getting some useful tips on how to solve 0h h1 or Takuzu, you can search for "0h h1 tips YPN" in YouTube

Very addictive. But cannot save a game to continue later...

My new favorite on the phone.

Lots of fun.

One of the best puzzle games on the market, spent many many hours playing this game

I'm really enjoying this AND 0h n0. I love everything about them. Fun and refreshing, plus not packed with ads or freemium purchases. Keep it up guys.

Couldn't say it better than the maker's own description. It's simple with just enough challenge to keep you going. It's smooth to run and lovely to look at. A well executed puzzler.

I LOVE this game, I would play it all the time on my iPhone 4s, but now that I've switched to a Galaxy Ace style phone, and I've gotten all the updates, I always seem to have the game crash. If it doesn't crash, then some of the tiles won't appear to change colors and it feels froze.

Please could a save function be added? It would make this game really awesome if I didn't have to try and complete a game in one sitting. I'll definitely make a donation payment and up to 5 stars when this happens

i like this puzzle. very simple and yet challenging. already shared it with friends. however, some minors details. a reset button would be nice to start over a puzzle; is more faster than having to tap a lot undoes. and more importantly, while the themes are cool, after a while some of them cause temporary color blindness. granted, contranoid themes may help, but the little shake effect is annoying, specially on bigger grids. please, provide another theme less stressful for the eye! (same goes for 0h n0)

This is a pretty good game. Simple and fun

Well done! This is a great logic / puzzle game. Simple and addictive. Strongly suggest you download this game now. Would love to see a bigger board on an update, although, not sure how that would work on my small phone screen.

Love what they put out, this is my favorite out of the ones. Great puzzle game, easy to catch on to. Deserves 6 stars.

Insanely fun, my only gripes are that I can't figure out the secret achievement and that the ChromeOS version won't sync with Google Play.

Happens alot where blocks get stuck visually but continue to receive input. Undo button can fix it but starts immediately.

I love the game, I'm obsessed with it! But I mastered it too easy, and now I can complete a game of 12x12 in 30 seconds. It would be great to get some even bigger grids!

It is an awesome game I loved it and Its mind game because of this I liked game and its amazing

Just the right set up for a good puzzler: simple rules, intuitive interface and logical solution every time. Guessing really ruins a puzzler and 0h h1 and 0h n0 require none of it!