so i'm making a point and click game like riddle school, and im trying to make a drag and drop inventory where if you drag an inventory object onto a certain object and release the mouse button it activates a special action (like dragging a key onto a door and in return unlocking the door.) and if you drag an item onto another item it combines them in some sorts. (like if you were to drag a blade in your inventory onto a stick in your inventory to make a spear.) i really need some help cuz i'm really confused so any help would be appreciated.