what is your opinion? Seems nice, but it's a little too soon to know yet.
what do you think i should add? Well... the game ;)
what do you think i sould do? I think you should focus on the storyline and make sure it's a good one, before you create the rest of the game.
what should be the name of the main character? Could be a cool reference, but choose whatever name you like.
how many character should you play? Only the girl, unless you chenge the story.
add enemys? Depends on the story
weapon/s? Depends on whether there are enemies or not :P
and more. בהצלחה :)