Thanks wildgoosespeeder for the comment. You haven't skiped anything, the laser room is just a little easter egg that you can get into if you put the block on the useless button. I do agree with you about the antline are a mess. I'll fix them once i can figure out how to make text appear for a custom story. for now, you got to deal with the problems. Thanks lots! =D

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

I think I skipped the laser part. It feels like I skipped something to the exit. Also the antlines are a mess and symbols often makes the problem worse.

Try my SP map?
http://www.steamcommunity.com/sharedfiles/filedetails?id=192976369
Try my COOP map?
http://www.steamcommunity.com/sharedfiles/filedetails?id=181160432

Interesting chamber.