To get through levels quickly is all puzzle games are about. Quick reactions are required most of the time as well, although you have to be careful and slow to be sure to do the right thing. Your feeling for a rythm and a balance is very important, e.g. for dart or pool. Although pool is pool and dart is dart you can not compare real-life dart with online-dart at all, all you need for online dart is your keyboard or mouse, with which it is especially hard to play dart even though you set your mouse up on a high level of sensetivity. Puzzle Games are really fun for a group of people, or the 'multiplayer' mode to play live against other online-gamers or your friends.