BUG: Resetting Drag and drop widget objects states
When the user clicks on "RESET" button to start a new attempt, the drag objects don't return to their "Normal" state, instead, they return to the "Dropped" state (picture attached after resetting shows objects that were dragged and return to dropped state).
This is quite confusing.
Also, the hover has an inconsistent behaviour when the mouse mover over the images, not always the mouse pointer is detected and make the objects flick between the normal and hover states.
This widget is far from useful or complete with so many bugs and terrible responsiveness.

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Jose Demetrio dos Santos Jorge commented
Another bug here: when dragging from one area (green) to the other (red), the dragged object appears behind the second area (pic attached).