After watching the video, I have reduced the collision box by 0.05 on both sides to make fitting into doors slightly easier and there is now grey text in the chest menu. Shaders for bosses have been looked into. Updates will happen next morning.
The intro cutscene is not in the demo but is in the full game. Skipping enemies is a Dark Souls quirk but a more analytical answer is that the shop has better RNG to have healing items than chests and that the charge slash into subweapon combo can quickly one shot enemies so you can maintain a good walking pace. There might be a popup for Gold in the bottom right corner in the future.
