This is a great premise with great atmosphere that I hope will be fleshed out more. Not exactly sure what those creatures were or how I was supposed to defeat them, as mashing the attack button triggered an attack sound and a hit animation on the mobs, but did no damage? Anyway, got to the end of the demo, but I have tons of questions about the plot and I hope to see them resolved in future episodes :D
Movement sound was quite grating, as the others have mentioned and the UI could do with some scaling up. Other than that, a good start!