I dug it man, gave me some of that 16-bit and Gameboy Pokemon cave nostalgia. I could see a main character roaming around a dark cave to this and got the "What's down there?" vibe.
Main thing for me was around 16s mark and 1m12s mark the audio cuts for less than a note a couple of times, whereas the rest of it is smooth. I don't know if this was intentional or not, but other than that it's good to me.