I like the dissonance at the beginning. I think you overdid the reverb a bit on that guitar, though. A couple of your transitions could’ve been way smoother, like :33, :56, 1:08, etc. After about 1.5 minutes, I’m not only getting a little bored of the minimalism and repetitive riffs, but I’m particularly itching for some more melodic content. I also found the transition at 1:54 a bit awkward. It is a very catchy piece, though, and I didn’t notice any major problems with the mixing and mastering. The fade-out ending came across as a bit lazy. I think my main problem here is the lack of melodic content. With a melody, the piece sounds very repetitive and structurally uniform. Including a melody will help give your piece a little more shape and contrast amongst the repetitive riffs and continuous energy. Hope that helps! When you think you’ve written a piece with a strong melody, please PM me and I’ll leave it a review. Keep at it, man!