It's a word-making game set in a physics environment. Play the endless mode or hurt the brain in 4 challenge modes. Being the extreme risk-takers that you know us to be (for risk-takers, read we sometimes wear purple with yellow despite the inevitable clash) we went for the challenge modes... and they did make our brains hurt, but in a good way!
We now know for sure that we know fewer words than we thought did. The main aim is to click on the letters in the correct order to make words - as many words as you can. There are various different challenge modes to conquer: Alphabet soup (make the alphabet); pit cleaner (65 letters fall, you gotta make words with all of them); endless (make as many six-letter-plus words as possible... forever!) and more. We failed to make antidisestablishmentarianism though, dagnammit.
Use the mouse to click on the letters in the order you want to select them. Click the tick to claim a word, and backward pointing arrow to remove a letter or the cross to remove a whole selection.
Keep an eye on where the letters are falling and make sure you keep an eye on the bottom left where the words are appearing, to make sure you have clicked on all the letters you think you have.