Nice work! Good chord progressions, interesting use of instruments, and it's cool to use the sound of a spaceship at the start (though I personally don't like the delay on the count-down). It gives me a good space vibe with most the instrument choices, though I found some sharp drum-esque instruments not entirely fitting this theme. Oh, and I would suggest fixing the cut-off at the end, it is a bit jarring ;)
Overal, nice entry, I like it! Good job :)