(disclaimer: AIM judge review here! these are just my opinions and thoughts, you can take from them whatever you like! music is subjective and all that. <3)
this is a really sweet, hopeful, emotional tune. the music feels very open and wide like how i feel looking at the artwork you chose! it's a nice fit, especially when the big drums start laying it down. i want to go running around these plains now. i love the windy field recording too haha, i am a big sucker for field recordings in music; super evocative!
there are a couple things i think could make this piece even better -- the first is shaping your lines more. the piano for instance could use variations in the note velocity (and even note length) to feel more human; a pianist won't be playing every note the same nor will they be playing at max velocity in hardly any cases. things like gradually raising and lowering velocities, alternating strong/weak hits, and emphasizing the important notes of the phrase will go a long way; for instance the main rising piano line sounds like its destination is those 3 high notes, right? so you could make the notes crescendo up to them. i think the supporting strings could benefit from a more delicate touch too, especially with their volumes; strings that swell and fade create a lovely, heartstring-tugging drama. FL's slide note feature would help you out with that, since slide notes can gradually move from the initial velocity to your slide note's velocity.
the other thing i wanted to point out is that you could develop your ideas some more. i can tell you've got a good ear for the right pacing of the song overall because there are high and low points in the intensity of the arrangement (stuff like the drums coming in and cutting back out), but you could also stand to write some contrasting material too rather than playing with the same parts. a "B section" to contrast this "A section", would go a long way... one of the first things i'd try would be something focusing more on the strings without piano for contrast. and ideally, some parts of the song could have a different "harmonic rhythm" i.e. how quickly or slowly you change chords/harmonies. this could introduce some tension or excitement for the listener; and while i understand you're aiming for a peaceful vibe here, i think you can stay peaceful while still developing your composition thoughtfully!