Hey, I'm a dittery young(ish) chap and I missed the tram the first time I tried it!
I've now missed three journeys due to these machines. First one I seen the tram coming along Broomhouse but it was the first time I'd encountered this idiocy, the second I was coming back from the pub and really did just need a "take me home button". The third I was heading to Haymarket for a meeting when I was stuck behind confused above. I've so far used the tram 4 times... Only one that wasn't frustrating was the return of the first where I had a day ticket.
It needs two settings stun and kill buttons single and day ticket, any thing else you need the menu. It strikes me they're more interested in collecting MI than a rapid customer experience.