Expa Front End Web Developer interview questions

Had a screening interview. Just a nice chat about my career, goals, etc. Everything seemed fine and dandy. They were super secretive about what I'd be working on though, so they couldn't really answer any questions I had about what I'd be building with them. So, that was weird. I didn't get through the screening process, but no red flags were raised at all during the conversation. Follow up emails went unanswered and there was no reason given for why I didn't through. Odd place.