Nice compositions! I made some notes so here goes.
Could hear some interesting melodies in horns but they were too quiet, so doing some basic mixing to get the right levels is a good next step. Would be cool to hear some counterpoint between the instruments, there are parts where and instrument plays the same thing as bass where it could play a different idea that "answers" the piano melody. Bass playing chords doesn't usually sound good (unless it's a bass solo, maybe).
I think just let your melodies breathe more! There's some strong ideas, but you need to consider phrasing and pacing to make them their best. A good melody is often easy to sing, and as humans we like things that sound like the voice so leave gaps for "breathing" (I know it's all midi, just trust me it'll make things sound more natural). As I said earlier give your melodies answers! If you have an ascending line that repeats a bunch, maybe every fourth one is descending for example. Or another instrument could play something completely different. At the end of the day, if it sounds good, it is good, just use music theory as a means to experiment.
This all takes practice, trial and error, writing lots, and most importantly, active listening! Make sure you're listening carefully to your favourite soundtracks and thinking about stuff like rhythm, phrasing, harmony etc.
Hope you found any of those thoughts interesting or useful, nice work on the submission!