Thats lookin cool as hell..I would love a port of that. I have spent some good time rollin around brinstar with metroid in my day. I wish I had a gba just to play it now.
an emulator can never be that accurate, as you'll require it. if you make a port, it will be optimized for gp32 100% and will have no compatibility problems, glitches, slowdowns or other problems a possible emulator could cause. a short answer to this then: it's not a waste of time to make a possible port
btw...
anyone knows how complete this game is? i haven't tracked gba homebrewn scene for a while. i can't find a sidenote on the homepage if it's finished or just a techdemo, prebeta... whatever