Behind Fez: Trixels in Depth

I took a look at the game's history on wikipedia:

http://en.wikipedia.org/wiki/Fez_%28video_game%29

and it states that it's been in development since 2007. Half a decade. That's crazy. Does anyone know why it took so long and how it's been financed?

I'm surprised, but also glad, nobody pulled the plug after the 2nd, 3rd, 4th, or 5th year of development. This is unusual for the game industry.