I've made 2 games already, but I'm not sure if I should use my real name when submitting or any other name will be okay. And if real name, legal name or the name people call me by?
I always just use Gizmo199, even for my private resume stuff. For me its more of a "branding" thing (and ive been using it forever). I treat it like an "artist" name. If you win / they need legal stuff you will need your real info but that is usually handled via email.
All that to say, personally I think its really just up to you and what you prefer. :)