I am also experiencing the inventory blackout. Looking in the Javascript console it appears to be throwing this error:
TypeError: undefined is not an object (evaluating 'item.adjective')
Maybe you have some item that is supposed to have a .adjective property that isn't defined. This last time, it occurred when I picked up a thing that looked like a piece of meat on a bone.
Anyway, what I was already able to see is pretty nice and engaging. The keyboard commands are a little awkward – would love to see moving left and right changing facing, and then just a single key for picking up, attacking, etc. as an alternative control mechanism. Graphic presentation is pretty charming.