Very fitting name and a nice piece!
I think you managed to get the vibe you were describing and have solid orchestration.
While there are many good things there are some things I feel could be expanded on. The melody and dance aspect is very good but maybe add more intensity when the melody returns. I feel here there are many options to make the dance even more hectic. As of now the dance with Death seems more sophisticated and not very dangerous. Playing around with the orchestration and/or adding more movement is maybe one thing that could be done. The choir section in the middle is nice to get a break and is a good idea. However, I think giving the piece more time, especially the intro/A-section would make the choir section better. It's good to have a place where the listener can regroup in a quieter section, by playing around with more dynamical sections (as in high intensity and low intensity) I think each section would be more impactful. Sorry for not being able to explain properly but I guess what I mean is working with excessive contrasting can be important. Also, I think it would be nice to have the instrument from the intro (not sure what it is, it kinda sounds like a glockenspiel...) come back in the piece.
I'm not an expert so take my feedback with a grain of salt and not as truth.
Overall I think definitely is spooky and Halloween-like and you managed to show a great dance with Death!