Not too shabby
Good intro! I love the guitar line at the beginning of this one. The drums are excellent, and the bass comes in right on cue. You may try lowering the bass an octave. I'm not sure how that would sound in this song specifically, but it does sound a little high.
The drums at 0:20 are amazing. I love that rhythm you use with the snare, and the fact that you switch it to the bass is really cool.
I don't like the transition at 0:36. It's way too sudden and doesn't fit at all. The speed up actually works hear, but only because of the shaker sound you used. It sounds like a time bomb about to go off, and bringing in the other instruments could be a little smoother, but you have the right idea. The random tempo changes are neat, but I'm not quite sure they work here. The speed up was okay, but the slow down is what makes it confusing.
I do like how you went back to the first riff, since I liked it so much. It makes for like a refrain, and it fits well. The slow down is okay here, but only because it's part of the outro. The ride cymbal is neat at the end too.
Not a bad track. Could use some work, but overall, I think it's one of your better tracks. Keep up the work man!