I personally wouldn't make it too cartoony, maybe more like a gritty caricature. I remember by the time I was 8, I was obsessed with westerns, I loved Clint Eastwood flicks the most. I would probably knock off artwork from actual westerns. Something with a feel like this, maybe?
And go with plenty of cliche stuff. Bullet holes, wanted posters, ropes, dusty old wood boards, etc.
Also, I would recommend maybe building a Trog cab. It is very much like a gauntlet in shape, but it has a half octagon control panel, which should make the controls feel a bit easier to handle with all the extra buttons.