I really loved that bass in the first track, the groove is crazy. You got me nodding with a stank face for the whole song, really.
Thought, I'd have loved to have some context about how these tracks would be used or what they represent, and I agree with markosegura, the songs seem to lack some balance in the frequencies. I'd say the mid frequencies are a bit crowded and there's not enough air. In the first song I'd reduce those mid frequencies and increase the volume of the shaker.
But overall really cool and well-rhythmed ost. I enjoyed listening to it !