Good song, instrumentals as a bit harder as they don't have words and vocal to carry them over. The area that doesn't work for me is the song repeats itself and doesn't add any additional flavor (I stopped listening a 2:47). If it where me, I would keep what you have, and see if there are areas you can add dimension to keep the listener engaged. I think you catch their attention, then you let it go after about one minute.
My two cents, good song, could be even better with a bit more variation.