I agree with TheSnowly : it’s well composed, the instruments blend together.
For me, what caught my attention is not the repetition but the fact that your whole piece stays on the same chord (Ebm7). You could have done a modulation by keeping the same arrangement (for example by going up a minor third) that would have changed enormously the impression of redundancy.
I remain on a good impression and your music works for an encounter with Green Tail.