If you start with only 5 lives
and must go through 11 levels of harsh battle, I don't think you'll
make it, unless you are lucky and
fast enough to get extra lives. But you can save your game, and use
PCTools to change the byte at offset 5(hex) to 05. This will
return you to 5 lives. I tried fixing it with FF, but I found out
that it doesn't work - I lose as if I had no lives left. You can
attempt
to screw around with other bytes and hopefully get more lives than
five.