Despite this being your first time doing something like this, I enjoyed this whole submission quite a bit.
There's a lot of attention to detail, especially in the instruments playing the melody, and I think your use of dynamics was well done. You also have a good sense of harmony that fits the idea of the game. Hopefully you continue to improve on these! Was not expecting vocals at all, so that was a pleasant surprise to hear in the final track.
I think if I were to give feedback here, it would probably have to do with the balance between the instruments. To my ears at times it felt like the melody was not as forward in the mix as it could be IMO, which I mostly felt in the second track with the heavier percussive/bass instruments.
While I'm sure it aligns with the theme, there does seem to be a pretty clear vision for this soundtrack that was executed quite well, so thanks for sharing it here. Keep up the good work :)