Not going to lie, I was only able to pass the first combination and go to the castle. I had a bit of trouble understanding how I am supposed to figure out the combination (I tried for quite a long time, actually! Did not want to feel stupid writing this comment, haha!) and the 5 key combination is almost impossible to brute force.
Visually, what a nice looking game! I like that you let the player mess around with items in the world, click and shake them. It gave me a point-and-click adventure game vibe.
Adding to this, audio also feels really good. It fits the aesthetics and also none of the effects feel out of place.
Well done & keep at it!