It caught my interest since the start, It kind of reminds me of Portal 2 Ost once again mixed with a little newgrounds flavour to it (there's just a set type of music that I associate with newgrounds flash games and this sounds like if it came from such a flash game to me). It works nicely around the tension building. I would work on the loudness of the snare during certain parts (around 1:20 and 1:45 it gets way too loud). maybe add some variety to it by panning or something.