Braid utilizes a rewind mechanic where in the player can rewind the action in the game at any time. This is coupled with puzzle layouts to each lever where the player has to use the rewind mechanics to reach certain spots in a level.
On the outset Braid looks like any other platformer but once any time is spent with the game users soon find that the puzzles are deviously difficult forcing users to think outside of the box and even time itself.
There is a definite sense of melancholy while playing this game which can make for a depressing experience while playing the game, which may reduce the amount of time played.