A simple iOS puzzle game that is devilishly fun to play. Just add positive and negative numbered blocks to one another to make all zeros.

• Easy to play: swipe blocks left, right, up, or down
• Lots to do: 120 levels and counting...
• Never the same: new levels bring new kinds of blocks

What’s New

Version 1.1

This app has been updated by Apple to use the latest Apple signing certificate.

• added 18 new levels for a total of 120
• updated some beginning levels to make them easier
• bug fixes

Ratings and Reviews

4.9 out of 5
161 Ratings

161 Ratings

sandman1318 ,

Awesome after all!

I want the revise my rating back to five stars! As it turned out, the few things I complained about were not a big deal. Yes, in more than one game the total of the negative squares were not equal to the number of positive squares. But what I didn't realize was that once you completely clear the board of, say the negative squares, you get the "winner" screen even though one or more of the blue positive squares remain. The other complaint I had was that the game often "grayed out" which prevented me from going any further. But I discovered this only happens when I hit the "back arrow" to try again but don't give the game adequate time to reset. Instead, I would IMMEDIATELY try making a new move which turned out to be the problem. This has to be one of the most fun games I've ever played and the hope to see additional levels real soon. I'm not a big game player so coming from me that's really good! 😎

indigovenice ,

Absorbing puzzle!

This is a wonderful puzzle game - really absorbing and superb if you need to kill time waiting for something.
Some games are easy and others are much more difficult to solve.
Even if you reach a point where you feel sure there is no way through - just keep on looking for other options and eventually you will find them

paulinstl ,

Maddening Fun!

What a wonderful game--clever design, takes one easily through the basics, then gets progressively more difficult.
I found myself infuriated to get down to a -1 that was totally unable to “Zero" the remaing 1. Sometimes I had to quit & return later in a better frame of mind. It is immensely satisfying to finally complete a puzzle and move on to the next. More, please! PaulB

App Privacy

The developer, SaturnBoy, LLC, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

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