I had one of these as a kid... and I'm above the mean age for readers of this page. Thing broke a few times and had to take it apart to fix it... 100% mechanical switches inside, good stuff!
Can't say for sure that is prior art... but seems to have them beat by at least a dozen years...
That having been said, their controllers do look sweet. My bad fingers are my middle fingers or I would consider one for accessibility reasons!