In fact, it doesn’t have many inputs, but maybe what I’ve missed is showing up on the screen.
In this case, on the first screen of the game, you could put the inputs to move on the floor, and the first time you appear to interact, "space" appears and so on. I wanted to implement something like that on my game, but didn't have time to and this is what I intended for visual explanation, literally appears on screen.
On the HUD, If it were with the mouse it would be more intuitive to interact with, cause I tested it with the mouse first, then I went to the arrows and in the end I tried WASD hehe
As you said the 1-8 of the inventory can be removed since it is even difficult to know where each slot is because it is a circle, leaving only in rotation with "QE" one more interesting challenge.