In regard to the forward fan array not being retractable without crushing front passengers legs, it's apparently a moot point as the two seater was a concept not necessarily meant to go into production.
It's a bit of a worry that the design team did not notice that small problem right at the start.
I expect the next announcement will be something like
"Yeah, that one was just the concept. The production version will have extra wings... and wheels.... and a big engine... and...err, lots of other stuff" 