Hi, thank u so much for taking the time to play the game, and i hope that u have enjoyed it :D
just to clear few things out, the game will have a prologue that will also act as a tutorial for the game, the prologue was not part of this demo due to time constraints we had. so i'm sorry if few things were not clear about the controls.
for example, u can press N to open the notes without having to go thru the inventory.
u can walk and aim at the same time, but focused aim (aiming up and down) is only possible if u stand still. the camera thing u experienced where u cant see what u are aiming at is one of the restrictions of the fixed camera angles, RE 1, 2, 3 and CV all had the same issue, but at least in our game we tried to modernize it a bit by making the camera pivot and follow the player movement. later on we will add FPS aim like the one seen in MGS 2 and 3 to correct this issue, also to give the player ability to see the environment from a different perspective.
u can combine by selecting items with a long LMB press (u can see instructions on the bottom right corner when u open the inventory, but i'm sorry its not so clear, this will be fixed by having the tutorial/prologue)