this game seems easier than the other two... i could easily get an 96p S rank in the first level, nd i only get 4 less points because of the damage i got from forgetting to pause the gb for about 10sec on the boss...
anyways, if you dont get what they are saing, i'll try to make a quick translation based on my experience from the other two
after the first mission, go right and enter the second door from the left, that guy will give you two weapons, the recoils rod, which charged shot makes you go higher and can break some stuff, and the sheield boomerang, that can be throwed with the charged shot. that guy is cerveaux, first option is to see the disks, second option is talk (talk will be useless, cuz most don't know nuthin bout jap here).
in the big room, stand in front of the girl (ciel) and press up. first option is to talk to the operator, second is to talk to ciel.
with operator, first option is mission, second is to go to already visited areas.
with ciel first option is data, (in data, first option is save, second load, third delete) and second option is talk. when saving over an already saved file, she says if you want to overwrite, first option is yes, second is no (default is second option, no)