Could definitely use some grading (especially as the landscape colour scheme is kind of grey/brown, which can be quite visually dull) and as aspect ratio adjustment, to make it feel more cinematic.
Those are fairly quick fixes (you could grade that in a couple of hours if you were just using a three-point CC). There are, of course, bigger problems with the film, just as there are with any short. The audio mix isn't great and needs to be levelled out - at the moment the dialogue sounds like it's happening in a vacuum, because the foley levels are either non-existent or too low. Similarly, though it's not of use to this project, the acting feels quite stagey. If you are introducing physicality to interactions in a film, then you really need to 'sell it'. This can be done through a combination of factors, but here are the key ones: acting, sound design and choreography. If that's not quite right, then the 'fight' (or scuffle, in this case) feels tame and as though it was conducted in a safe space. Getting this right is real hard (especially when the actors have to deliver dialogue simultaneously) and that's one of the main reasons I've never tried anything particularly sophisticated when it comes to on-screen violence!
There's plenty of good stuff, as well. I think the film is visually clean (if was tidied with CC and aspect ratio adjustments especially) and has some interesting camera shots and lighting decisions. 'Mob boss in the shadows' borders on cliche, but I liked that the actor was very softly spoken, in a Mike Tyson way. I wonder whether that could be played with - maybe make him go bigger, because, in comparison with the long haired guy, he seemed like he was underplaying the performance. But I think your actors (if you are sticking with them for a sequel) would benefit a lot from being given some freedom to improvise and deliver the dialogue with less of a rehearsed feel. I think they will also be helped if they have more of an arc (another cliche...), which this doesn't have, I guess because you want to leave it open-ended for a sequel.
But good job, it was an ambitious short and not at all badly executed.