Very great map, it seems like there's a lot of different ways to reach the end.
I didn't noticed anything strange, except for the first hand-pushed button, the one that make the ceiling go down on the begining. Took me a while to figure what it was doing (opening the door on the left). You should use some dotted lines like in the official maps.
Anyway, really great, I give it an 8 out of 10.

I saw the video and i can't believe i missed the room to get the cube
I actually did the ninja mode without knowing xD

Ninja mode:

Instead of bothering to get the cube (i didn't knew i could get a cube) i used the camera to get the door stuck and place a portal in the floor

By the way, the last jump is really tight. Took me like 10 tries to get to the other side :S...

just played it... it was way too hard for me, I couldn't believe I am such a bad player
especially the flings... I don't like flings.
anyway, I was unable to complete the catcher puzzle, as I didn't know there is a portalable wall on the other side of the glass, above it.

I don't know why so many people are having trouble with the ball catcher, I figured it out on the first try.

Great map, but the last fling could have been easier, or at least have no goo, but something else so you can't die.

Great map. I actually managed to play straight through it without cheats or hints, and I tend to think I'm terrible at those tricky fling maneuvers. Or maybe I'm just getting better after fighting my way through so many insanely tough maps.

The only part I struggled on for a bit was the room with the crushing spikes - for whatever reason I couldn't make the straight-forward solution work for me, and so ended up with a much more tricky fling along the wall past the door and slid in sideways. It took me quite a few tries to get that to work, and it was mostly luck.

I was most impressed with how you set up flings that I would have sworn weren't possible, but that I managed to get in the first couple of tries. I would never have thought it was possible by looking at it to fling directly across the acid to the ball-catcher, given the shallow pit there to build up momentum but I gave it a shot anyway, and got in on the first try. I stared at that last fling across the acid pool for a few minutes as well, and just couldn't see any possible way to make that happen, but there was also so clearly no other option, so I gave it a shot and got it on about the fifth try. Very nice use of angular momentum, I've never seen it demonstrated so clearly before.

I just played this map. I didn't have to much trouble with the ball catcher, but that first jump with the ceiling coming down. That drove me nuts for awhile. I kept trying to jump across the pool to the portal I made on the platform. Then I figured out it was easier to put a portal on the wall above it.

The rest was well done, and challenging, but not impossible.