You have a good ear.
Your going into a song writing class eh? Man I would have loved to do something like that in my life. I liked the instruments you used here. This may or may not suit the series I think this song could be used in something different I have a couple of video assignments this week if you would like I'll drop this into one of my videos and share it with you :). I'm glad we are audio buddies now.
Any ways about the song!
This is fundamentally amazing music. I really liked the feel of the kick to the snare it has that (as you say) "gallopy" feel to it. Its the simple things that make this song really effective. The nice little saw waved bleeps and bops with the mesmerizing classical string sections. I only wish there was some lyrics or something to give it that added wow factor. I loved it!