I have just released an updated demo that better represents the game in its current state.
It has quality of life improvements like the interfaces (inventory, main menu, notebook) being controllable with mouse alone, keyboard alone (no mouse-wheel necessary) or a mix of the two. This includes a button for opening the main menu on the top-right corner.
Speaking of the main menu - that has also been completely redesigned to better fir the theme and interfaces of the game.
There are a lot of improvements to the games graphics as well. The only thing that separates it from the finished game is the voice acting. Some of the roles will be re-recorded by professional voice actors as promised in the Kickstarter.
Oh, and this demo includes the complete first case of the game. But this will change the closer we will get to the release date. So better be quick if you want to see if you can correctly solve the first case.