No, any shortcut becomes useless because you are forced to get up there and activate the big fan in order to go up and finish the level...
It can still be done pretty fast the normal way... all you have to do is take out the snipers they are the only ones that can really harm you while you run away...
Level 13 went good... even when you can't skip the first group of enemies you took them out reasonably fast
I'm afraid for levels 14 and 15 i won't be able to help you or give you any tips... especially with level 15... It really got me angry how freaking full of senseless walls that level is...
I'm able to go down the hangar as soon as you see it, but that doesn't matter because you are forced to go though all the place in order to open the big door... Ill show you when level 14 is done...
Good luck with it, I'm sure you can still get a good time even when playing it normal
edit: I'm able to know what level is next thanks to this (normal) walktrough
http://guides.gamepressure.com/timeshift/guide.asp?ID=3743
It can still be done pretty fast the normal way... all you have to do is take out the snipers they are the only ones that can really harm you while you run away...
Level 13 went good... even when you can't skip the first group of enemies you took them out reasonably fast
I'm afraid for levels 14 and 15 i won't be able to help you or give you any tips... especially with level 15... It really got me angry how freaking full of senseless walls that level is...
I'm able to go down the hangar as soon as you see it, but that doesn't matter because you are forced to go though all the place in order to open the big door... Ill show you when level 14 is done...
Good luck with it, I'm sure you can still get a good time even when playing it normal
edit: I'm able to know what level is next thanks to this (normal) walktrough
http://guides.gamepressure.com/timeshift/guide.asp?ID=3743