I haven’t played this game myself but I’m certainly tempted to purchase it!

Steam’s page for the game can be found here: http://store.steampowered.com/app/26800/

“Braid is a puzzle-platformer, drawn in a painterly style, where you can manipulate the flow of time in strange and unusual ways. From a house in the city, journey to a series of worlds and solve puzzles to rescue an abducted princess. In each world, you have a different power to affect the way time behaves, and it is time’s strangeness that creates the puzzles. The time behaviors include: the ability to rewind, objects that are immune to being rewound, time that is tied to space, parallel realities, time dilation, and perhaps more.”

The game is only single-player but you can collect Steam Achievements which always adds to the fun of the game for me.