Let's start by learning how to use the interface

Drag the letter which appears in all the words on the left but not on the right

Notice if you drag a into the answer box, there is a green ☺ next to the words on the left, and a green ✔ next to the words on the right. This means that your answer matches the words on the left but does not match the words on the right.

If you drag e into the answer box, there is a red ☹ next to the words on the left, and a red ✘ next to the words on the right. This means that your answer coed not match the words on the left but matches the words on the right.

Colour key ☺ Your answer matches the word on the match list (list on left) ☹ Your answer does not match the word on the match list (list on left) ✔ Your answer does not match the word on the don't match list (list on right) ✘ Your answer matches the word on the don't match list (list on right)

In order to complete a puzzle, you must all ☺ on the left and all ✔ on the right.

{
    "stage": [
        {
            "anagram": "ae",
            "data": {
                "match": [
                    "bat",
                    "map",
                    "pat"
                ],
                "notMatch": [
                    "beg",
                    "met",
                    "pet"
                ]
            }
        }
    ]
}