Not sure what a TRS-80 is as I don't think we had them here, but I had an old Spectrum and did the same :)

But there are tools on mobile/web to create those things also. I've been researching and trying to get something that is intuitive to work on tables to program web apps (it started web based, but now moving it to mobile as I think it matches the visual paradigm better).

There are various tools for kids to learn to program creating games (Scratch is probably the most well known) but other visual programming apps also.