Great game! Gives me a sort of 'Stacklands' vibes. I really liked the different biomes, and the progression path was easy to follow.
I also had the negative health bug, but your suggestion to drag food over the worker fixed it. Also, my cursor didn't line up with the UI (if that makes sense). Dragging an item would show the item hovering a few blocks away from where my cursor truly was - but it wasn't too distracting.
A draggable inventory and a way to minimize the 'You won!' screen would have been nice too!