Holy shit, I love this. I would buy a friggin' smartphone for this. A few quibbles with the actual card-battle gameplay itself, I'd have to playtest this as is to actually figure out how I feel about it - putting in a positioning aspect would probably be too triple triad / shoehorned in - but just overall, in general? I really hope this is brought to Yoshida's attention somehow as it's exactly the sort of far-reaching thing I think he was waiting to see.