You have a really interesting concept, you know! But you have a some mistakes in gamedesign.
Player just don't know what to do. I was running about 5 minutes without anything. I didn't find any keys, or doors. There is should be some marks on walls/floors maybe sounds, something that player can remember and use to navigate. You give a really cool experience of time limit - floor are falling apart - nice I was really excited by this, but it's to easy to escape and my panic feels just disappeared.
Anyway, you did a great job!