It took my a few attempts before I understood that I needed to bring the candies back to the starting point to increase my fuel rather than getting a fuel refill as I was sailing. Once I figured that out, everything made a lot more sense!
I had some troubles sailing through some of the narrow passages since the boat seemed to get stuck trying to turn to fit through them. You might need to play with the hitbox a little to make those smoother or auto-rotate the player ship to make it easier :)
Good choice of music!