Is this Mixed Properly?

Our 16 Bit Warz Nova M EFFECTS ver.mp3
This is one my favorite songs! XD
I've ALWAYS had a problem with mixing/putting together songs. I usually get the timing right, but sometimes it just dosen't sound good. [is there] Anyway I can make this better?
I already drew the pic for this so I might upload this when I can(after finding out if this sounds ok, of course)

AND is it OK if I keep on posting stuff HERE for advice? If not that's fine.

I guess it's okay if you'll post here. Why wouldn't it?

Anyway, I have trouble with mixing too, and I usually put up the karaoke and a version of the song WITH vocals to match everything together. Also, downloading REAPER might help you, but I still mix with Aydacity...

Bullet for Prisoner Nova Seiun ver 1.mp3

How does this one sound? What do I need to fix? I think it has volume problems, but I'm not sure...

It's mixed properly, but at the chorus the music overpowers her voice.

Also, how did you get the .VSQ to work into UTAU? It needed a lot of editing, right?

I'll try to fix that then.

The first time I used this VSQ, I just imported it into UTAU. Then I checked to see if there were any "-" things in there, and then I fitted it to Nova! It was very easy, actually. I did almost no editing.

Ah, ok...

Division Destruction Rei Nova Ai ver.mp3
I finally have a use for all those appends I've been doing! XD I didn't have a sweet voice so I used my friend's UTAU Ai Sairen. Only thing I can point out is that at the end when they're all singing it sounds too loud or overpowering, something like that.
Does this sound OK?