I listened to all three. Good stuff. I can see how you're influenced by video game music in your sense of harmony and instrumentation/arrangement. Speaking of which, I think you have a good grasp of both, as well as instrumentation. The melodies are nice, too, but since the clips are short, it's hard to judge how the pieces would turn out.
If I can give a little bit of advice that may or may not have any real relevance, maybe you could work on adding a bit more counterpoint. I know video game music is usually homophonic (or heterophonic), but it's always nice when there's a little polyphony to sweeten things up at times.
Incidentally, "Autumnal Wind" reminds me more than a bit of "Green Wind" from Soma Bringer...
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