I often play the game using the keyboard, but working with the inventory gets really frustrating. Two things that would really help are:
1) The item pop-up when donating, planting, etc being sorted by bag order rather than alphabetically. (If rice is first in my seed bag, it should be first in the pop-up. Right now cabbage is.)
2) The up/down arrows should work. Right now items can only be selected by left/right, and it throws me every time.