Hello there!
First thing first make the cutscene skippable with escape especially in a demo. People wants to see the gameplay to know if they will purchase the game.
I walked around for 10 mins not knowing where to go and examining every guards. The first guard I saw was the one with the carriage. The path should be clear at the beginning at least for the tutorial where you should go.
The camera moves so fast. It is hard even with the lowest sensitivity. The platforming does not feel good because of the low jump high. When landing sometimes the screen becomes totally purple.
Usually, to put down an item, you use the same key as taking it. The combination of ctrl+click is weird since click is throwing it. Ctrl key does not seem to work.
I think if you want to make a story driven game, you should keep it linear at least at first to guide the player and make the interaction feel good and rewarding especially during exploration.