Track 1: I love the music box-cello combo! Somehow, this track feels Studio-Ghibli esque, and I quite like it. I do think a change in the repeated chord progression would have done this track well.
Track 2: This is a lovely little village theme, but it takes the same structure as the first track: take a chord progression and add new instruments every repeat. I would have loved more variation in the chords sooner-- but what you have is very sweet, and the harp section half-way through is a welcome change!
Track 3: This track again takes the same structure as the first with the build-up of the repeating chords. That said, I love the intensity, and the tone shift is great. The steady drums give this track an ominous feel!
Track 4: I am a big fan of the playfulness of this soundtrack, and this track especially is a delightfully bouncy and jumpy thing. The percussion is absolutely wonderful. Once again, though, the same structure is used. There is a shift later in the piece, but don't be afraid to make more changes, get weird, and avoid getting locked in!
Track 5: I enjoy how this track brings back the music box from the first track-- it is a lovely little tune, and a very spritely tune. Still, don't shy away from chord changes-- they will add a layer of interest to the music, for sure!
In all, it's impressive what you created, and each track sounds really great timbrally. I am really charmed by this soundtrack!