Bugged like hell. The reviews below suck and so do the idiots who wrote them. If you don't like math, then don't play a math game, play a stupid game that involves no talent and bright and shiny colors like nuclearoids. My problem with it is something that is actually valid. I clicked on one square and as the instructions said, I hit the right arrow key to change that number from its default starting value of 1 to 2 and 3. Ok. I did that with another number. Still works. For a while. On the 4th number however, it stopped changing anything but the 3rd square I clicked on. I click on a 4th square and press the -> key to raise it from a 1 and what does it do? It raises the 3rd one instead. Maybe it was because the value I left in the 3rd one at "1" because that was what it was supposed to be? But now it doesn't matter what I click on, I can have 2 squares that are highlighted blue, but the only square whose value it will change is the top row 2nd column square. This game could have been a decent puzzle game but it is unplayable. Sloppy, indifferent oblivious programming. Did you actually care if anything you wrote worked once you compiled it? Did you never even once TEST the program you yourself wrote? You just assumed you're so awesome that it would work perfectly without a 2 minute check? Well let me tell you, you failed. Doing the 2-minute test would have been a good plan. Are you not embarrassed by this? I would be. I guess you don't care if the stuff you did works or not. The only game of yours I've seen that's any good is the peg jumping game.