Oh that title theme is just drenched in moodiness. Slow progression complemented by great layering of the differing elements. Really nice call and response trade-off between the strings and the piano as it approaches the end. This is laden with emotion, and made for quite the stark transition into Home which is so airy and carefree in response.
Think you nailed the Overworld vibe, good call on changing out the lead instrument to provide a little bit of a change of color. Great work with these two, curious to see what else you do in the future. Great work, and best of luck!