Arkhan, what is your favourite MSX game? I'd say choose your favourite MSX game and port to Amiga taking advantage of Amiga's capabilities, that would be interesting. Change the name and some features to avoid being sued by Konami or other major MSX developer that is still around.
Space Manbow! That was a good MSX2 shmup. Besides Apydia and R-Type, the Amiga needs more j-shmups.