Thanks a lot man! Most of the sound effects came from online, though I recorded a few of them myself (mostly any ripping or peeling sound was me, and obviously the voiceovers.) There are a few moments where I wish I could have moved the mouth, but I didn't really get an idea on how to do so until I shot the bit with the flattened alien and the credits scene (which I think was good in theory, but the movements could have been handled a bit better).
Don't have anything specific in mind just yet, but I think for the next stop-motion I do I'd like to do it entirely stop-motion, no live action. Confine it to a small set that I build up. I'm thinking of going for something with a bit of a gothic horror vibe to it, but its gonna take a lot of planning before I really get going.