http://beta.visl.sdu.dk/visl/en/edutainment/games/wordfall.php
“WordFall” tests your knowledge of word classes in another fashion. The computer picks a random sentence from the set of pre-analyzed sentences, and then lets the words fall, one at a time. As they fall, you use the arrow keys to direct them into the appropriate word class container at the bottom of the screen. Press the down arrow to increase word fall speed. Compete worldwide for high scores.