Dont Tap X (com.huge.dontapx) on Google Play
This is a very interesting game to challenge your reaction. The Letter comes one by one, if not the letter X appears you must click on to score in limited time, but if it appears the letters X, then you must control the fingers do not click on it, otherwise the game ends. More score you gain, more quickly the letter comes. Seemingly simple, but very few people can play high score, very challenging, oh! I wish you a pleasant game!