The title theme is reaaally nice. Love the vibe, the feeling, it's simple but great.
The overall style and vibe are really cool, I love it!
Now for the more negative points, which I mean as ways to improve of course : First, you seem to often rely on very short loops and ostinati. My advice is, if you're going to create OSTs for a video game, ask yourself if you could hear it looping for like 3 hours straight lol. Of course it's very hard, but maybe you should make longer loops on the same idea or write loops that chain to one another with a lot of variation! The idea is just to break the flow of the loop from time to time.
On the same note, some Pan uses are very flashy, like the percussions in The Siren's Call which sounds cool but again I think it's tiring on the long run.
Overall it's still a cool submission with a defined style and it works quite well, I'm mainly focusing on detail thingies. Good job!