Added a new mathematics game for math practice.
• Sharpen provides a simple and interactive way to train your brain and memory through different exercises.
• These exercises/games are designed to help you improve mathematics, memorizing locations, numbers, letters, shapes, colors, etc.
• Daily memory training can also improve the time one can concentrate to be more productive in their daily life.
• There is no level limit in each game. No matter what your current levels are, you can keep playing it to challenge yourself.
• Enjoy and improve!
