Hey Samantha,
I checked out your work and you have made a great start with your work. Ironically enough I just had a brief spell of time working with Hans Zimmer and I too started my music career on this forum so you are heading in the right direction
If you are looking at getting into games I would say that you should really brush up on your production with sample libraries so that they are final product quality. In the games industry you rarely get to work with live players (I am currently working on 2 triple A titles) so the sound of your result is more important than orchestrational correctness. For this you should check out the Vi-Control Forum. There are plenty of professionals there who can teach you everything you need (thats where I learned)
Keep focused on your goal, take on as much advice as you can. In time you will get there, I have no doubt.
Daniel James
www.HybridTwo.com