Would it also be possible to port it to some of these systems?
Watara Supervision, Mega Duck, SG-1000, Amstrad CPC, MSX, PC-8801, PlayStation, 3DO, C64, Uzebox, Apple II, Neo Geo CD or Wonderswan?
Mmm, probably, but my interest is on mainstream 2D consoles with a good C devkit. For example, I don't think people would be interested in a port for PSX or Dreamcast, those are 3D machines. On the other end, Sega Saturn has a great reputation for 2D stuff.
I also have another rule, being able to test on real hardware on my side, which means getting the console and a flash card, in the long run, it costs a lot.
I think there would be interest for a PSX version, at least in Japan. 2D games were the console's life over there for quite a while, compared to how it was marketed in the USA, where it was trying to compete with the N64's 3D more directly. "O-chan no Oekaki Logic" among other titles are pretty good examples of successful 2D puzzle outings on the console.