As Paulie mentioned earlier, the trailer music market is highly competitive; a nice melodic tune is simply not enough; production should be on par with commercially viable music on the market, if not better.
Again, you have a really solid foundation, and I really like your music.
Here are a few tips that might help you, in no particular order:
- When you see the word Neo-Classical, this implies a smaller ensemble, a quartet, or a chamber orchestra as opposed to a big ensemble. The use of a solo violin or a viola should be prominently featured.
- The marcato articulation, although short, tends to be longer than the spiccato. You want to look for some type of drive and the fastest possible articulation.
- Don't be shy about using non-orchestral instruments such as hits, wooshes, and synths to fatten up your sounds. At the end of the day, you need to have a trailer-style instrumental and not a classical piece of music.
- There are different instruments in the orchestra other than the string section; make use of them.
- Don't play the strings as a keyboard player would, but rather look into chord voicings and string arrangements.