First of all, please note that you are replying to a 24 year old
message. But that's cool; not only was Flashback an awesome game, but
they released a modernized version of the game a few years back so the
topic is still relevant. But this is a problem common to GoogleGroups
and you may be better off using a free Usenet service like
eternal-september.org in the future.
You are definitely correct in your assessment of the problem, however.
The second level jump was specifically made so that an ordinary leap
wouldn't get you across it; you had to make some a very specific type
of jump (that, I think, wasn't used anywhere else in the game) that
was only mentioned in the manual. It was purposefully non-intuitive
because it was intended as a form of copy-protection.
The apparent solution is to jump when you reach the edge and try to
grab the ledge above. This, as the original poster noted, does not
work; your leap does not take you far enough. The actual solution is
to just keep holding down the run button and, when your character gets
to the edge, he will automatically leap up to the ledge. Not that it
matters; I doubt the originally poster is still waiting on the
solution 24 years on. But that's what you had to do. ;-)
Flashback was a cool game. It's a shame the sequel was so poor,
although that mostly had to do with its terrible controls rather than
the gameplay, story or graphics. Your character moved like a tank in
that game... a 100-ton tank with a 20hp engine (that was broken) and
was stuck in mud. I don't think I ever got past the first "world" of
that game, the controls were so awful. It's a shame that game never
got a remake.