A neat little game with an interesting concept on puzzle solving , the demo here lacks a few things like a story , some narrative / voice acting and have more things to interact with but as you say in your description you are working on a full fledged game so you are already aware of most of the downfalls, it will be interesting to see all the improvements once the game is released.
Maybe there could be a new trailer/teaser on what is to come next.
I featured this on my compilation it is the second video in.