The beginning is very evocative of a Modern Sonic stage (especially something you'd hear in Sonic Colours, or even Unleashed). I quite liked it, it did make me smile.
After the intro, though, the bass and drums could be a bit more driving -- I imagine some tension actually building up from the end of the intro to the beginning of the verse. That lack of buildup actually made me feel like it either had an anticlimactic start, or something went missing.
I quite like the synths you through around 1:03. The section around 1:20 also sounds happy. But again, with a bit more pumping bass and driving drums, it'd make people get up and dance out of happiness, you know what I mean?
2:29 onwards was a classic example of good buildup, considering how the main theme was repeated a number of times in the piece.
I have no complaints about the mixing; nothing seems really hard on my ears. It's just the musicality that I'm able to comment on for this piece. Still congrats on landing your entry to the RAC, and all the best!