Oh woah. I've been working on my own Halloween themed pack and it looks like we used the same mausoleum reference. What are the odds? (It's set at a different scale, so you don't have to worry about us competing with each other when I finally finish it.)
This pack is lovely. I love a lot of things about it, but my favorite is the drifting dust mote(?) animation. It's so subtly atmospheric, it's perfect.