I tried playing "Companion's Portal" (from http://myaperturelabs.com), and I'm stuck in the second room. There's an alcove high up the wall with a forcefield that I can't seem to pass. Youtube videos of the level show people just jumping in there, and I haven't a clue how they do it.

Anybody who played it and can tell me how to get in there ?

you have to take out the turrets first. get creative with the energy ball