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By SaturnBoy, LLC

This app is only available on the App Store for iOS devices.


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 in Version 1.1

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


iPhone Screenshot 1
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iPad Screenshot 1
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iPad Screenshot 4
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Customer Reviews

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! 😎


The game is interesting. I love puzzle games like 2048 and merged which is why I downloaded this one but it seemed a little less functional than the others. My app would glitch and not allow me to play every once in a while by sliding the tiles so I would have to kill the app and then relaunch it in order to be able to play the level. Also the app doesn't allow me to play my music in the background while playing which I thought was kind of annoying.

Logic Challenge

I enjoyed getting through 120 levels in a few days time. Some of these levels took almost an hour of replays to get through. I highly recommend this game. I think I gained an IQ point.

View in iTunes
This app is designed for both iPhone and iPad
  • Free
  • Category: Games
  • Updated:
  • Version: 1.1
  • Size: 2.5 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

Current Version:
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