Brain code is a brain teaser game with different kinds of puzzles that are designed to stimulate different parts of the brain. It is a great way to spend time while challenging your brain. The interface is nice and it is easy to use. You can choose to use English, French or Spanish in the interface, which is a good feature. It would be nice if there were more options when it comes to the background color, but the color changes when you change the level, which is also a nice feature.