based on the demo version:
- the UI is very dated and not the "oh, how nostalgic" kind but the "Oh god, I was so glad we had left that kind of bad behind"
- the controls are clunky at best and the character movement speed doesn't help
- the dialogue is horrible. It has no real flow and feels entirely unnatural. What little story there is doesn't bode well for the future
- the mother's character is all over the place and completely off-putting (can't say anything about any of the other characters since she is the only one that has at least some minimal exposition)
- that voice-over...
since it's only a demo version for what is clearly an alpha/early beta I won't comment further on bugs and controls. If they're truly that great at 3DCGs as some comments here suggest I think they'd be better off doing a VN style game instead of this. And maybe hire a good writer.
... well, at least I know what they mean when they say "with your sanity intact" ... they mean the player, not the character.