It could be a resolution issue. What's your native resolution? The HUD doesn't scale with the screen in this version, so maybe you're running at a low enough resolution to hide it?
Most likely to be honest. I saw on twitter the new demo is coming out soon so it's like no biggie, i can wait for the new demo to come out.
Great! And thanks for the reminder about that issue. I haven't even thought about the HUD that much lol