"Tubes" is an unrivaled brain game that assesses your planning skills. You have to plan and understand the problem before you start to solve it. Your concentration and problem-solving skills are also needed to be at your best.
In Tubes, you get few tubes with fluid in colors. Your goal is to pour only one color per tube. You can't pour different colors fluid on top of each other. Yes. That's it—it sounds simple. Well, maybe the first level is easy. Later, you will have to think and plan. A lot! So, start training your brain and have fun.