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

Several problems exist with this map. Trapping issues exist in the fling pits you created. You can stretch laser fields and fizzlers you know. The two pedestal buttons to the exit are redundant. Tedious activation. The cube is at risk of being lost to the goo forever. You use the three link modes incorrectly. Here's why:
http://www.cs2bus.com/sharedfiles/filedetails?id=292356592

Try my SP map?
http://www.cs2bus.com/sharedfiles/filedetails?id=377129237
Try my COOP map?
http://www.cs2bus.com/sharedfiles/filedetails?id=376181211