Track 1: Woodwinds, percussion and pizzicato strings are a lovely way to convey the playfulness and youthful vibe of springtime. The flute/pizz flourish that happens is a lovely way to add more interest to the music, and I wish it lasted a bit longer honestly! Those breaks in the repetitive texture help drive the music forward, so excellent job there. (And as a violinist, we cannot play pizzicato that fast XD but that's no worry for the violinists in your computer!)
Track 2: Love the banjo and solo strings here! It's still a little playful, but more laid-back for a summery vibe.
Track 3: I could imagine the sound of this on a real cello being even more beautiful-- nothing expresses love and longing quite like the piano and the cello.
Track 4: Ooh-- this opening gives me Luigi's mansion vibes completely. Nice use of the N6 chord, we stan her :3
Altogether, each track is very nice. I especially like the bolder harmony in Track 4. Solid job and keep up the good work!