Thats a tough one dude with the mobility issue.
I dont want to say card games or board games with her situation. Some find that too mellow.
Maybe take her to a drive in movie (if theres one around you)?
Maybe go sight seeing by car??
Some girls dont mind playing videos games so thats another ideal.
Maybe play darts? Maybe come up with some game where both of you are seated? Ping pong or tennis on chairs???
With your culinary skills maybe also have a barbecue too?
Is it possible to take her to a play or comedy act??? At least she doesnt have to walk around too much.
I want a girl who likes to talk. ......I just dont know what to say sometimes and would rather just listen.