Keep working with your software!
I think like most new mixers on NG, you have a good base of knowledge with your software and what you want to do, but still a long ways to go. Start working with drum kits a lot more and effects on those, because a good beat can go a long way. Also, some variance to the original would be good to hear as well.
If you want to hear some great NG video game mixers, check out my favorite artists/songs (and of course, I mix as well, so feel free to check out my songs as well, though they aren't nearly as good as many NG mixers). Keep working at it!