Two colors and a single shape -- apparently that's all it takes to create a fantastic iOS puzzle game. That's all Bicolor really is, but I absolutely can't stop playing it. It's the kind of game you'll beat your head on the wall over, simply because you'll wish you had thought of the game yourself.
Each level in Bicolor presents you with a rectangular play area populated by square spaces of a lighter color that stand out in contrast from the darker hue of the background. Your job is to cover all the spaces so that they are the same color as the background, and you do this by swiping your finger over them -- but there's a catch. You can only color a certain number of spaces, and only certain spaces can be used as starting points, and on top of that, there are also lighter colored spaces that need to be expanded either before you being canceling the out, or as you play out each level.
If this sounds unreasonably confusing, I promise you it's much more easy to grasp when you go hands-on with the game, and the simple mechanics become second nature in no time. What never becomes easy, however, is wrapping your head around each level, as the seemingly endless number of color, number, and layout combinations means you'll never see a similar level twice.
The App Store reviews for Bicolor call it "brilliant" and "addictive," and I couldn't agree more. It's the perfect relaxation game. The puzzles demand your entire attention, so with every fiber of your brain tossing around possible solutions, the problems of the day tend to fade away. It's just fantastic.
There are 240 levels, which is more than enough to keep you busy for weeks, and since Bicolor is priced at just US$0.99, that's a bargain you really can't pass up.