Saira (Sa-ee-ra) had multiple endings but im not going to re-complete it for the different endings because the ending I got was a really happy and satisfying ending. 
Every environment was unique. Even the music changes through the different environments. The game was around 5 hours+ for me and the game has a linear/open world style narrative story. 
I recommend it highly. I can't wait for more episodes. 
You can download the demo then. Buy it through steam.  only £7.19 right now (03/21/2010 - US style date)