Welcome to the forums! Glad you like the game.
Multipart monsters aren't procedural, but, they do have some of the C64/platformer feel that you mentioned. Basically, they are monsters that change as you fight them. For example, with the one we have right now, if you destroy the wheel, suddenly it can no longer move, and stuff like that.
We have lots more planned for the game, I think you'll be happier as we get closer to actual release.