First, make sure you savestate at the beginning of level 26, and
as you progress. If you get too far, you will miss out on the next point.
Make sure you pick up a bomb, and drop it on the airship at the end,
otherwise you will never be able to finish the level. Your airplane
will just drop into the water, at the end of the level, and you will
keep losing lives.
That way you get a true ending for level 26. You don't need to keep
playing it after that point.
If you get stuck, keep using save and rewind to get past the harder parts.
Sorry, this Game Clip has been removed