Like other reviewers Have said, English is not the first language of the app producers, as you are denied words that are found in the dictionary. Game is slow. I HIGHLY RECOMMEND YOU STAY AWAY FOR YOUR OWN SANITY
Word Twist is a game where you are given 6 letters and you have to build valid English words from them until the time runs out. For each built word you earn points. Points award coins that can be used to play the game with unlimited time. English words extracted from WordNet database by Princeton University.