I could imagine this as a video game piece alright -- a city ambience or a title screen theme. I love the instruments you've used here -- you've been imaginative with the instrument combination here.
My only complaint is that apart from the area around 1:07, there isn't much dynamic variation, and some themes would work well with buildup (starting soft, going loud, and then resolving). This piece could also work well as a loop (if you're thinking of ultimately making it a city ambience or a title screen).
I give you my respect -- you are very imaginative, and I like that. For the instrument combination alone, I am putting this into my favourites list.