The rhythm's on point, the build, synth or strings humming with a gradually increasing buzz as you near the big drop... the keys/chords that get added in around the 44 second mark though... feel a little out of sync with the underlying beat? Maybe they really aren't, maybe that particular instrument just gives that impression; there's some kind of sonic delay ingrained in it, but it really feels to me like they're slightly off beat with each hit - a bit too late. The other layers sync well, and you really do get into the grove after a while! Good energy.
I like the instrumentation around the 4:22 mark in particular, gets crazy in a good way and builds and builds and builds... and fades nicely... and builds again! And drops nicely. The transitions are great.
Maybe the intro could be a bit less gradual, or build more notably, it takes a while before you really get into it, and the slightly off sync keys distract me a bit, other than that this is good! Proper sound quality and bass too, though a little compact possibly, I'm no production pro so I wouldn't know the first thing to adjust, but a little more space and richness with the sound might take it to the next level. Maybe you could play a bit with panning on the transitions too? Seems that might work well with this kind of music.
The style reminds me a bit of some kind of mix between Prodigy and Aphex Twin... which is always a good thing.
Very solid start! If you didn't say so I wouldn't have known this was just a preview, it plays like a full-fledged track already. :)
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