Everything worked as I expected. I pressed TAB, I got the map. I pressed ALT, I got a pop up for the pickable items. Gameplay feels as it should.
On my computer at least, I am getting big stutters, which I know is a godot thing, but maybe look into how to pre-compile shaders and stuff like that, beacuse the stutters are quite bad (again, godot thing sadly)
I managed to find a bug with the portal to Mines/Town. I enter the portal from the town, and it takes me to the Mines lvl 1. But when I enter, I am on the Mines lvl 2. I enter the portal to the Mines lvl 1, and it takes me there, I go back to Mines lvl 2, and now the portal takes me back to the Town. So there is something going on in there.
Other than that, I don't know how it was on the original Diablo, but I feel my character is kinda slow. It would be nice to have some option to run, maybe at the cost of some kind of stamina ressource, even if is not in the OG.
Edit: I tried to swap my equiped weapon with one from the inventory, but I had to un equip mine first, and then equip the other. Make it so that I can just select the item from the inventory, and "drop" it on top of the equiped one, and it get automatically swaped.
Keep up the good work!