Dockside Groove: Compositionally, I think this is a fun and interesting little loop. I think that the addition of a prominent bassline would make this tune even more fun!
Sailing Winds: I like the use of the twangy main instrument which I think suits the main adventuring/sailing theme well. I think this is an interesting use of the pentatonic scale (or variation of pentatonic?) and gives this track a unique sound.
Gathering Storm: This track starts out sounding more hopeful than adversarial. Though the drums do add some kick and energy to it!
Among the Stars!: I like the building energy in both the long synths and the drums. This would make a satisfying climax for your game. Though the ending could probably benefit from a little more pop followed by resolve. Overall this would be a fun little soundtrack to listen to while playing the game you describe. Good job and thank you for sharing!