Good song
A very diversified with elements from quite a few genres, it seems. I especially like the ska-like riffs you have in here, they sound very good together with the drums.
The bass is a bit too low here, the drums sound very weak.
Towards the end the track loses a bit of it's originality, maybe it's because there are no vocals in here (just like you said in the author comments). Maybe a few soli from various instruments would help, but then it wouldn't be a "instrumental for a song with vocals" anymore.
{ Review Request Club }