Guess the five-letter word in six tries. After each guess the tiles turn green (right letter, right place), yellow (right letter, wrong place) or grey (not in the word).
But the ball is always moving. It smashes into your guessed tiles, cracking them with every hit. After a few hits a tile shatters and its letter is gone for good, so remember what it told you.
The longer you take to guess, the faster the ball flies.