Yeah, that one is a great online emulator. I've played around a bit with that one. I have fond memories of the BBC Micro from my school days, especially the game Castle Quest.

How does it handle being run on a mobile phone? My main focus with JVIC was to try making it as easy as possible to use on mobile devices, although I'll admit that my testing has only been on Android so far. I haven't tried it on iOS yet.

Castle Quest - an impossibly hard game (to modern standards). I spent so many hours only to die and start al over once more. Great fun!

My Android phone is way too old and slow to load jvic, unfortunately. Let alone jsbeeb.

But works great on my 2013 laptop when plugged into a wall socket!

Yeah, it was very difficult, but a lot of fun. We used to book the school library's BBC Micro out after school and spend an hour or two each day trying to beat it. I still remember working out how to use the torches to guide the little men to walk into the room with the spider, and how to escape from the prison cell. - I'd love to try porting this game to the VIC 20 at some point. Same cpu, but the VIC's graphics are more limited. Still, with some of the tricks that people use in some of the games and demos for the VIC, maybe something similar could be achieved. Pitfall for the VIC 20 is really impressive, graphically, given its on the VIC 20:

https://vic20.games/#/pitfall

Oh yeah pitfall on c64. And loderunner on Spectrum, those were the days... And: Impossible Mission

How about Realm of Impossibility?

Every time someone mentions 'ROI' at work, for a split second I'm back at the old 64, not doing my statistics homework.