An excellent game so far (although I'm rather peeved no epic weapon dropped for phoebe so far, damn you!).
My one recommendation would be that spacebar or esc act as the back button, either in the main or/and battle menu.
Otherwise keep on the good job!
My goodness, someone with a brain in these parts? I think I just fell in love with Nelfie :o.
And do you notice the "useless to spend onto" part after the truck loading, megumi?
for bug hunting issues, enemies don't die if they fall at 0 HP, they have to go under it to be counted as dead o.o. Dunno if it was meant that way, just pointing that fact out
:P, I won't bug you for the grammar, since I know you wrote that on purpose, but seriously, keep working at it man! You'll end up doing something awesome!
 "Crystal Story"){kind=icon}
 "Cube Droid Saves the Galaxy"){kind=icon}
 "A Quest for Idle"){kind=icon}
 "Frontline Defense Beta 2"){kind=icon}
 "Duck, think outside the flock"){kind=icon}
 "my first platformer- the obstical corse"){kind=icon}