I'm gonna suggest messin' with the colour of the jeans, that cyan kind of colour looks pretty weird next to the blue on the shirt.
I'm also thinking it might be a bad idea to keep her hair+tail brown, it just doesn't really 'go' with blue. Maybe make it a little more orange to get some contrast?
If you're really really dead set on adding more detail to the character, I'd say go for something fairly simple. Maybe add a logo on her shirt or give her a belt or something. Less is more and all that, especially when you're going for an n64 kinda look.
As regards the tail; think about where a tail connects on a dog. Or, think about where your own tailbone is! It's between and a little bit above your butt, basically. The positioning looks okay now that you've changed it, but it's hard to tell from the side.
I'm also thinking it might be a bad idea to keep her hair+tail brown, it just doesn't really 'go' with blue. Maybe make it a little more orange to get some contrast?
If you're really really dead set on adding more detail to the character, I'd say go for something fairly simple. Maybe add a logo on her shirt or give her a belt or something. Less is more and all that, especially when you're going for an n64 kinda look.
As regards the tail; think about where a tail connects on a dog. Or, think about where your own tailbone is! It's between and a little bit above your butt, basically. The positioning looks okay now that you've changed it, but it's hard to tell from the side.