Thanks for checking it out, and thanks for the useful feedback!
The web build is really not well optimised and is quite constrained with godot, so I think it can freeze sometimes. I will try and improve that a bit!
I've got a change incoming that puts the various 'army, inventory, factions, quests, skills' buttons in a bar at the bottom of the screen. I hadn't even considered that players had to magically know that tab opens the menu.
The economy needs some real balance work to make these kinds of materials available. I'll look into these idle villagers and beat them into order!