The level is a bit different from the typical Portal level structure, but this makes the surprise even more exiting! Not going to write spoilers here, though;)
The only thing is i got stuck here. Is there a way out? 
Thank you ! I'm glad you enjoyed it !
Oh I see you stayed in the gravity volumes until the end. I think there is no way out unfortunatly :/ you'll be pushed against the wall forever....
The solution for now is to jump from the volume before. I'll try fix it, shouldn't be so hard.