The basic idea of the 64 main levels of this game is to eliminate obstacles to an "energy flow" by finding monochromatic mini-paths of length 3 or more. (There are also 16 untimed and hinted "find the differences" puzzles, one after each 4 main levels, with a picture and text description of some fantasy character as the reward for completing each of these puzzles.) Each main level has aThe basic idea of the 64 main levels of this game is to eliminate obstacles to an "energy flow" by finding monochromatic mini-paths of length 3 or more. (There are also 16 untimed and hinted "find the differences" puzzles, one after each 4 main levels, with a picture and text description of some fantasy character as the reward for completing each of these puzzles.) Each main level has a time limit, and the levels get more difficult as you go along, but basically it's a pattern and strategy game where you just can't take too long to implement the strategy. BUT that all changes on the last two levels, and that's why I down-rate the game to neutral. Suddenly it becomes primarily a game of speed, as the field of play scrolls by quickly and if you don't get enough of the right matches made in that brief time, you can't complete the level. I'm older (in my 60s), I like strategy games but I'm not that quick with a mouse and I know it. I would never have gotten into the game had it presented itself early on as requiring very quick action. I enjoyed the first 62 levels but personally I found it was very frustrating to get almost through the game only to have the basic nature of the game change to a form where I couldn't complete the entire game. Maybe if they added an option to control the speed of the scrolling (which was also somewhat jumpy in nature on my PC, making the required rapid mousing even more difficult), it could be a speed challenge to those who want that but remain primarily a strategy game for those of us who prefer that. If you're not fast of finger and really like to finish a game you get involved in, pass on this, but if you don't mind that the last levels require quick eye and hand coordination or you just don't mind getting most of the way through the game and then having it change so you can't finish it, it's pretty good. As to the cost, I got this game as part of the Playrix Platinum pack, which is a much better deal than buying the games individually.… Expand