This is solid! I like the overall sound and the drums and instruments/ambients sounds fits well together. To me it sounds like it is loud enough.
I think that there is room for even more sub in that 808 and I might even try to EQ some of that 500- 2k out to make some more room for the snare. I would try to add some more attack to the snare with a compressor or a transient designer, and maybe add a touch of reverb to make it fit with that main ambient sound. My first impression of the hi hat was that it might have a little to much reverb on it, but I might be wrong, and I might fit after a little tweaking. For that main ambient sound I would try to make it wider to give more space for the drums!
Looking forward to hear more from you!