Very interesting concept. Especially like how you can select which enemy/item is in battle using the grid system, that's brilliant.
However as already pointed out, it's very difficult to get a grip on the combat system. Besides missing feedback, I think the main issue is that first combat is already very complicated. It would be nice that the game starts simple with few enemies/items, and characters with single ability. This way the player can slowly get used to the game system as the game complexity ramp up.
I totally understand you ran out of time on this one. It's quite impressive what you got done.