Hard to know what's supposed to work and what's not in the current build. All I can say is that I can't talk to anyone despite the "Talk" button appearing over their heads, and I get to the gate at the end of the first level and I can't interact with it at all.
Hard to know if its supposed to be like this and these things just arent implemented yet, or if the build is just broken. Would be good to clear that up somehow.