Portal - The Flash Version

Cheat Codes:
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Submitted by: RM

Hit Escape, go to Options, turn on Console.
Back in the game, press ~ and type "nextlevel"
other fun commands can be found by typing "help"

Level 9:
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Use gravity to give you an extra boost.
Shoot a portal in the roof. Shoot one under you. Now you should
be continuously falling. While you are falling, shoot a portal 
on the bottom next to the tower. Your extra momentum while 
falling will give you an extra boost when you come up. Next tower. 
Shoot a portal to the left side, as high as possible. Shoot another
portal at the bottom right. Jump in. If you don't have enough speed
to clear, aim for the bottom portal. 
Second time should be fast enough.

Level 15:
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This one is kind of hard and requires timing.
Stay on the high ledge. Shoot a portal into the middle (a bit to the 
right of middle), shoot a portal to wall above the entrance. Jump 
from high ledge into lower level portal. You should have enough speed
to shoot across. Now you're in the middle ledge. Shoot a portal under 
you. You should reappear back on the high ledge. Shoot a portal into 
the middle of the lower level like you did the first time. Jump in from 
the high ledge. You should have enough speed to fly up from the middle 
portal into the energy section. So timing is crucial here, so jump in 
as it's about to go off. Once there, hop to the right and you're clear.

Level 26:
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Stand as far right as you can. Shoot portal above red button. 
Shoot second portal under the cube near you, landing the cube 
on the red button. Walk through the portal and stand on the 
other button. The door will open, now shoot another portal on 
the far right wall, and one on the wall to your immediate left. 
Pick up the cube (F) and walk through portal. Place cube down (F) 
on the button to open the bottom door. You can't move through the 
blue line, but you can shoot through it so open a portal anyway 
beneath it. Walk through and exit.