Hey, I actually think you did a really good job creating a dark atmosphere with this. I especially like the way you lead into the song. However, it sounds like your kick and snare are causing a "pumping" effect at some points (such as 0:21-0:31) and I'm not sure if it's intentional or not. It kinda sounds like you're pushing it way too hard through a limiter. It also sounds like there are some really low frequencies in your kick that are interfering with the bass. Gradually high-passing your kick might help to clean up your mix a bit.