Excellent track! It would have been a shame if you hadn't joined in!
The chord choices are very good, we're really into the spooky Halloween vibe, especially from 1'10" where the modulations make the track even more dramatic.
Between 20" and 1'10", I could see this music playing against a boss in a Disney game (Halloween night starring Donald Duck).
The ending is very well done with this change of tempo.
In short, it's all good!