Caused me to bob my head along so mission accomplished. This definitely gives me Halloween boss vibes. I think the intervals really helped with that and were a good choice.
The production value was also good. The stacked guitar is a nice touch and helps give the track a heavy energy (that and the epic drums).
Also, the playable demo music video was really fun. It was so well made that if someone told me that it was a real N64 game, I'd believe them.
Great work!