Love this game, had to stop playing though since unlocked levels on previous phone won't transfer to new one for some reason 😭 but it's a great game if you love number puzzles. Definitely makes you think and can be a good time consumer when you move on to difficult levels.

Pure puzzle heaven... I highly recommend this game and declare it the world's first 6 star app... Bravo!

I enjoyed the game. I have four keys left. There is no way I can use them . I have played all the games. So what can I do with them ? I thought I would get more games ,to use them.

Good game - reasonable UX missing a few possilities such as an 'undo' that allows you to rollback X moves. Be nice to be able to drag from one number to another number and the inbetween numbers get filled in...

I'm not sure what happened, but apparently it's lost my progress, tapping on the grid doesn't always change the selected cell, and the whole thing is suddenly harder to actually complete. Add to this the fact that the Back button is in an odd spot (right beside the Restart button), and the fact that it plays an ad every single time you go back to the puzzle selection screen (whether you finish the level or not), and it's far more frustrating than it's worth.

Great logical puzzles. Some can appear easy but then you may get stuck and have to change your answers.

Great logical puzzles. Some can appear easy but then you may get stuck and have to change your answers. Software error: none of my hinter achievements have been rewarded despite achieving them. Sometimes I use hints but they are not counted towards the hinter achievements until I leave the game then open it another time. I have become a master achiever, therefore I should have hinter achievements. I have not been rewarded my master achievement either despite achieving it.

I love this. Only criticism is the awards given, not using hints limits the me to an apprentice. When will there be more levels released? Please say soon :)

The concept is simple, but many of these puzzles can be almost infuriating to complete. The range of complexity is very wide, which means there's one to fit any state my brain finds itself in. Addendum: Having owned this game for well over a year, I'm still coming back to it. I've gotten far better and am ready for a level beyond the red now. I hope the developers introduce one soon.

I don't know how else to ask a question other than to write it on the review. I absolutely love this game!! LOVE! That being said, something is not working on my phone on this app. I don't know how to fix it and I really would like to still play it. Can you tell me a way I could communicate my issue with the developers? I can't text what all I want to on the review cuz it's too long. Please help!!!