Thank you for all the kind comments! Feel free to post video responses if you come up with a remix.
Some basic info: To achieve the keyboard sound at the beginning, I set the keyboard on "saw lead." Most keyboards have a saw sound; if not, try for a "synth" sound. Then, I went into my keyboard function options and set the reverb to max, giving the melody an "echo-like" effect, which is one reason it sounds cool. The hits are the sound "orchestra hit."