Lovely work, really.
Score things: Make sure dynamics are under/referring to specific notes, not just sections (i.e. m. 60).
m. 107 is great; the Bartok kind of sound is awesome, so to be even more like him, it would be nice to see beaming over bars, otherwise it looks kind of awkward with a beam in the middle, rather than the typical 2/4 beaming.
It may be tempting to right "molto cresc. e dim." as a tempo marking so it applies to everyone, but it's better to not. I've had conductors get really mad at commissioned works for misusing it.
Bass harmonic notation... String players don't really like this notation, which is their main gripe with Ravel. You should also place where in the actual register you're making the harmonic, and also the sounding note.
Orchestration things: Are you sure the tongue ramming will be heard over a fortissimo glissando trombone, not to mention fluttertongue in the rest of the brass?
At m. 115, there are debates as to whether or not bass drum should carry a tie over a bar ever. I've been taught both ways, so just make sure it's what you want.
Looking through your score I see no real reason why you would use a drum set, specifically. I'm pretty sure the whole piece can be done with 2 percussionists.
You're submitting this to a competition? They will be kind of off put by the sheer lack of marimba notes in your score despite it being written.
I personally wasn't a huge fan of your slow melody but it interplays alright with the rest of the ensemble.
The harmonies are really nice and the interplay is fantastic. Good work!