I've been playing the PS1 version of this recently (Kaitai Daisensou), up to stage 5 so far but I've got a few queries.
Am I right in thinking that whether the orbs are large or small or not depends on your position in relation to the things that hold the orbs when you destroy them? At best I can trigger the first extend just before the second boss, does that sound decent? If I don't get close to 100 by the end of stage 2 then I might not even trigger it till stage 4

Also on the stage 3 boss ( the large monster that chases you up a vertical tunnel), right at the beginning of the fight when he comes right up to near the top of the screen and the blocks are falling down on top of you, I cannot yet survive that bit without losing a life. Once he goes back down to the bottom of the screen it's much easier but it's still a pain to lose at least one life there everytime.
Stage 4 (Sunken Town) is much more straightforward, as long as I don't get killed right at the beginning I can no miss the stage unless I make a mess of the boss.
Only been as far as the lava pits on the downward vertical section of stage 5 yet.
