Cheers for the comments guys. Good and bad. We made this game a while ago which is why it looks a bit dated now but I'm glad people are still enjoying it.
BTW if any of you want to punch my head in I'm 'MAJOR LOOK'. :)
For level 6 get yourself on the platform. Close the portals by pressing D then place a portal on each target. Then jump and land on the portal underneath the down arrow and when you come out the other you should be high enough to reach the exit platform.
For level 9 put one in the ceiling and one in the floor below. As you're falling from above put a portal to the right so when you land you jump higher out the right portal.