Really digging this demo! It reminds me a lot of something, but I can't quite put my finger on it. The guitar swells and the distant guitar lines panned left and right are quite nice. I really like the upbeat drums as well.
At this point you have a really solid jumping off point. Now where you can take this is up to you, but I'd suggest having some kind of large climax in a post-rock esque fashion. I'm thinking like the track "Threads" by This Will Destroy You.
I look forward to hearing more of this!