"Call to Adventure" has a nice, grand feel to it.
"Lost and Found" gets a little repetitive, though it could work in the context a quick cutscene of the protagonist finding an item. The pad layer adds warmth to the track.
"Discoveries" has a nice, gentle melody and I like the key shift. The arpeggios add some nice background texture.
"Reunion" was the best of the bunch imo. Starts a bit meloncholy before swelling into a more hopeful part. It then builds into the climax well which gives it a strong impact.