Songs of a Forgotten World: This has such a cozy sound. I really like your use of lute/plucked strings, strings, and woodwinds together. Your main theme has a strong core identity and would make this game instantly recognizable. I also found it very catchy and memorable which I think is an under-emphasized characteristic of good main themes.
Meet the Spirits: The waltz sound gives this track a dance-like quality which emphasizes the pleasant and jovial nature of the spirits in your story. I like how this track has parallels to the main theme, but still has its own core identity. This is excellent soundtrack writing.
Overgrown Settlements: Ooh, I love the shift in mood. It is clear that we are now in an area with a little more mystery and mysticality. The part at 4:14 (based on the Youtube video) with the voice-like pads and the soft, round, and intimate plucking gives a nice spiritual sound.
I absolutely would not have been able to tell this was your first time writing multiple themes for the same game. You included a good amount of variety and the cohesion is particularly strong with your consistency in sweet and intimate instrumentation. Great work on this and thank you for sharing your music!