Well, it's a game now. Just have to fix up a few more fiddly bits and maybe add smoke and some point bonuses. Might be a possibility someone will take my offer on the Yahoo group to program a slightly speedier screen rendering routine for refreshing the map on screen. Right now I use a bunch of MID$ print commands. If that were possible, it could possibly be even speedier. I guess we'll see.
I suspect this will be my major effort for RetroChallenge 2017. Hope I can get it finished.