The goal is to build 4-letter words from left to right, choosing one
letter from each column.
Valid words will disappear from the grid, and the remaining letters
will drop down to fill in the gaps.
⭐ is a wildcard -- you can use it to match any letter.
You start with 2 minutes on the clock. Each valid word you enter adds
10 seconds to the timer. If you need a breather, tap or click the
timer during a game to pause.
Let's get ready to TUMBLE!
Toggles the list of letter possibilities at the bottom of the screen.
Hard mode prevents you from guessing words that are not possible
answers, based on the letters you've already guessed.