This has got to be the hardest calculator strategy game in existence. It combines enough graphics to make gameplay comfortable and natural with a great concept and level design matched only by professional games.
Like I said, I highly recommend this game. However, it has little to no replay value except for the last level, which is so ridiculously long that there is no way to remember the solution.
Frankly, I don't know how the author managed to think up so many intriguing tricks in the levels. Most people won't be able to solve the first level in only a day or two. Make no mistake, gentlemen, this game is HARD.
Like I said, I highly recommend this game. However, it has little to no replay value except for the last level, which is so ridiculously long that there is no way to remember the solution.