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Frustrator

DISCLAIMER:
Read my profile before reading the rest of my comment!

To expand on m3g4t0n's comments, I have a guide all about what he is talking about with symbols and antlines:
http://www.steamcommunity.com/sharedfiles/filedetails?id=292356592

There are exploits like mad in this chamber, especially with white gel. There's also trapping issues as well because I managed to not be able to activate the exit when trying to get back up to the exit! Here's a guide how to fix trapping:
http://www.steamcommunity.com/sharedfiles/filedetails?id=264300097

Try my SP map?
http://www.steamcommunity.com/sharedfiles/filedetails?id=377129237
Try my COOP map?
http://www.steamcommunity.com/sharedfiles/filedetails?id=376181211

First of all, you have too many buttons with symbols instead of antlines.
If you're going to have more than 10 buttons that uses symbols the symbols will start to repeat.
This has happened in your chamber, you have 2 buttons with an X on them, making it VERY confusing to comprehend..
It doesn't matter that the buttons are not in the same room.
And for the record, antlines are much mor efficient for the player.

And some of your buttons don't have either symbols or antlines.
You should really fix this by changing buttons that show symbols to show antlines instead.
And also assign indicators to the ones that don't have.

Also, I broke your chamber with 5 portals .

Download the demo file (.dem) of me breaking your chamber here:
http://www15.zippyshare.com/v/5FwTyfOR/file.html
m3g4t0n_frustrator.dem

If you don't know how to watch .dem files, read this quick and easy guide on how to:
http://steamcommunity.com/sharedfiles/filedetails/?id=378130536