So, invisible walls are a pet peeve of mine. It's annoying when the air is hindering you where it really feels like it shouldn't. Also I've found a spot where T can drop the bomb to make it unretrievable.

https://www.dropbox.com/s/zkysgtunwt4w1rs/2014-08-22_00005.jpg
You should be able to get behind that tree.

https://www.dropbox.com/s/l8glszfiupkbche/2014-08-22_00004.jpg
Why can't I jump off this roof? Nothing is stopping me but the air.

https://www.dropbox.com/s/cyqd593fiu9wof3/2014-08-22_00003.jpg
The bomb is in the air above the roof, simple jump drop put it up there. If it goes to competetive it will start happening.

I enjoy the map though =) It's a fresh alternative to the normal formula. It also reminds me a bit of Piranesi, a map that I love. I hope you keep working on it.