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

Why are you part hooking up to the exit and part blocking the exit with the laser field? Also all cubes need cube droppers because you have a fizzler present. Aerial faith plate not needed. You can stretch glass you know (seeing the thumbnail and the glass leading to the exit. Also your use of links could be better. Here's a guide:
http://www.steamproxy.net/sharedfiles/filedetails?id=292356592

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