oops - I should’ve flagged that as a “known bug” - thanks @codeswept it actually doesn’t scroll at all (on any platform), but I can resize the buttons and fix that pretty quickly.
I’ve done a very short write-up on my thoughts and experiences building this app, not everything went to plan, I didn’t get quite as much done as I would have liked to, and the whole thing was almost entirely derailed by feature creep but all-in-all it was actually great fun and I would recommend that anyone have a go at the #wdc in the future!