This is great! I like the contrast between the relaxing melody and the aggressive bassline.
Some minor points of improvement: the pad that keeps fading in and out during the intro is a bit harsh. Try EQ'ing some of the highs out of there, or use a very slight lowpass filter.
Furthermore, I think the (acoustic?) snare you used doesn't really fit in this track. Try using a different sample for that, one that has more high frequencies to it.
Overall, I like this tune, and I'm looking forward to hearing the finished one!