Well, that all depends. For the moment my main goal is just to get it working well on Windows, including UWP, though I would like to make it run on Mac and Linux as well.
Eventually, if there is enough interest, I'd like to do a higher resolution UI with maybe the option to drive with the mouse...there are also three other games in this same series, so depending on interest I'll work on those too.
imho, they are pretty fun/playable as is, so I don't need to do much...but then again, I've been playing them for 20 years, so perhaps I'm biased. :)