comic like a Scrabble game or a crossword puzzle.
It's a really fun experiment, and is another example of things comics can do that nothing else really can.
I applaud them and this effort. It reminds me of some examples from Scott McCloud's Understanding Comics and Art Spiegelman's A Day at the Circuits:
That having been said, it's a really tough device to pull off, even for just short gags. If anyone could figure out how to work this device into a longer-form story, then I'd really be in awe.