It's hard to say how many levels right now, but I'd expect around 20 or more. I'm planning on keeping it pretty short, but I could change my mind.
I'm also unsure if I'll keep the original mario player gfx or not.
A cool feature I'm thinking of putting into the hack is to have points where you can choose where you want to go or what action you want to take, and that'll affect the story, and the ending.
For example you could choose to chase down a character or to ignore him, or you could enter the forest or the cave etc. So in one case you would take the regular exit(chase him!) and the other you'd take the secret exit (won't be actually secret but you know). So for the most part the point of a split path in the story will be obvious but at sometimes I may make the choice less obvious (like if you fall in a certain pit something could happen, but making the jump causes something else to happen).
I've been thinking of having 3 different endings: Good, bad, and cliffhanger.
Hope I explained that well. Yeah I’m still working on the story; I’ll reveal it soon.
I’m going away for Spring Break next week and won’t be posting for about a week or more, but feel free to comment on anything I revealed or to suggest anything you would think would fit well in this sort of hack(I’m open to all sorts of suggestions, as long as I like them). Also the name “Game Boy Adventure” isn’t planned to be the final name, once I got the story down I’ll probably rename it.
Oh yeah and the Scarfies from kirby are vertical electicity sprites with invisible "mario pass only" blocks above and below them.