Very Original sound!
The song sounds very Celtic, as such your title and goal match your song. Good job on this.
13/8 is a really really really difficult meter to write to, and I commend you on doing this well. The unique and uneven (4/8 is even for example) meter gives it a driving sound that pulls the song forward and creates interest in what is coming next.
I really like the ending of the song. I will say that more can be added to the song. especially since the ending has a peak of intensity, and allowing some falling motion would increase the effect.
Over all great job! keep it up, and if you want to collaborate on something let me know.