Awesome game, but I have found a few bugs.
The doors don't seem to like jumping. On level 6 I jumped through the finish door and instead of advancing me to the next level it shot me out of the start door.
Also on level 9 (I am not sure if this happens in all levels) I was able to jump back through the starting door and I would die.
Damn, I tested it out and thought I completely fixed that bug. Thanks for reporting, I'll check it all out.
thats not roto-scoping
all you did in that tut was trace images. roto scoping is when you trace a video frame by frame >:(
Same thing, i just didn't bother to do the whole thing in the tut, that would have took a long time, but you learn how to do it well.
Joined on 2/26/06
Portal: The Flash Version 
Drawing Board 