Alright was finally able to play it,
gotten to level 17 (bit of help from a walkthrough needed not much {stuff like level 9 i had my portal positions wrong}) and can't find the exit 
I've got the power orb into the doodah oojamaflip for it all sentries taken out afaik and just a bit stumped
Figured out 17, 18 OMG what an easy piece of piss just walk right to the end button and zap a portal near the lift, don't even need to bother about the cube
Stumped on 19, can't get anywhere, just smack into walls
/ 
