My brain hurts.
This game is very addictive. It seems like a combination of common math and Sudoku. As much as I hate math, I really enjoyed this game. I got to level three, then my brain exploded so I had to quit. The controls were very smooth since all you needed to use was your mouse. Overall, it is a good game where all you can do is trust your smarts. I'll recommend this to the puzzles collection. Keep up the good work!