You have nice opening chords, and I only noticed the snare coming in at :29, quite softly. You build it up quite slowly, and when it does come on, it sounds alright I guess. Intro sounds a bit bare, but OK.
The drums' frequencies are encroaching on the rest of the mix, causing it to be muddy when it appears. Otherwise, everything seems to have its proper place at the moment. I don't know if it's an issue with where you pan the instruments, EQ or sidechaining -- but that could be any one of those.
Nice bass, by the way. Nice wobbles. At 2:14 they sound really really milky and nice.
2:38... sounds a bit dissonant, I guess. Some notes are clashing with each other, F and E, or semitones thereabouts.
3:25's wubs sound quite dark and scary, so the title is quite fitting. I could have sworn it was a monster under the bed doing that.