Unfinished Swan game length?

I was just wondering how long it takes to finish this game. I want to know if it's something I can do in one uninterrupted burst like Journey or whether it needs a few sessions to finish.

Thanks in advance.

It takes anywhere form an hour to 2 I believe. I played half of the game and lost interest once I got to the third level. By the way, Journey was my GOTY for downlable games excluding The Walking Dead seeing I got that on disk. 

My little brother beat it on one sit in and he's 13 so I guess that should be enough info I hope for you.

its around 2 to 3 hours, depending on how fast you can figure out where you need to go.