This is a link to an article that was in Games TM some time ago on use of time/ space manipulation as a mechanic in video games. Includes interviews with myself and Jonathan Blow (Braid).
I thought i'd stick it up.
download here. - Update - New link added.
(I don't own the copyright for the Games TM article pdf obviously, so if this is a problem, i'll take it down. Shouldn't be though.)