This looks very SNES/Final Fantasy style inv with DPAD/cursor controls. Can we have a Drag-n-Drop system instead with mouse? Can the player walk into items in the world and they go into the inventory? Can we create and split stacks? Can we drop items in the world? Can we have multiple bags with different capacities? How can we use this for a crafting ingeredient system? How can we use this for shopkeepers item listings and sales? How commented is the code? How easy is it to change and expand? Thanks.