Know word quiz

Tap on letter to select.
Tap on another letter to move the letters.
Move the letters to build the words.
The quiz has 5 level.
On the first level you have to bild 3 words and 3 letters long each.
On the second level the quiz has 4 words for each theme and 4 letters long each.
On the 5th level you need to build 7 words for each theme.