The beginning is great, and I don't know if you intended this or not, but the piano sound slightly hidden is very interesting. It forces you to get into the track and listen, and is a trick I did often in my stuff.. understated details! The buildup all the way to 1:36 comes with variety and interest! Now when the beat kicks in, I suggest focusing on mixing those drums so that they are more balanced in the frequency spectrum (the kick could use low end, the snare could you use some rolloff of the low frequencies to allow the kick to shine and a bit more definition in the very high register, the hats could also use more definition in the highs), and perhaps compression on them (if you know how to use this properly). To get your drums to stick out in the mix, try rolling off the low end on anything that's not a kick or a sub (and even then you may do it with these), and the two main areas where the snare hits. Great job!
I really like the part that starts about 1:37
This is a good tune