Rename the variable to "allCorrectSelected" or "allWordsSelected"

1. If I select a wrong word and press "OK" the letter changes.
2. The correct words having the letter turn the letter green in that word (tells that the word is correct). There may be a better way to show the selected words without making the letter green and use the "Ok" button validation for check?

1. Actually, when a wrong word is chosen and pressed "OK", all the selected words are then deselected and the same letter appears again. This could push the child to take time and observe each word again, instead of trying all possibilities. Any thoughts on this?

2. We could just play the voice when the child selects a word. When the child presses "OK", we could highlight the current letter in correct words.