I acually liked your fanfic. And it was funny too, so you do get some points there. I thought it would rpobably work, though I think your fanfic would be best fitted to movies, cuase so far there hasn't really been much action, like you said. You need to make a new chapter Or put in that old Chap 3 you said you had.
Fanfics don't normally make good games, normally becuase if you make one it has to be involved with the story, and you have to tell the story it can't just get to certain points and be random. Thats probably the hardest part of making an RPG like that. An example would be when Protoman smashed those 2 Robots in. Unless you just want a random battle or somethin, then show what happens at the end, it would be hard to convey it right. Unless you wanna cut some corners, and be lazy...
Thats my thoughts on it though. It could work, with enough effort put into it.