Context is the magic word.
There's a big difference between using words to explain what's going on and words as content. I use very few words where possible in my own apps to explain how the app should work but words as content is a very different matter.
My $0.02. From 30,000 feet a game mechanic pretty much breaks down into pattern recognition, even the thumb twitching games require there to be some kind of order to the chaos and give the impression that if you figure the game out you can progress ever onwards. Games with little order that rely on finger dexterity alone tend to have limited appeal and a short life (Super Turbo Action Pig ;)
So why not use words? They come with meaning (often more than one), the meaning changes with context and position to other words, they're free and you can read a lot into them.
GeivN A SnecetnE OF JbmuleD WrdoS YoU SiltL SeE MianenG
Sprites on the other hand need all their meaning ascribed to them.
screen If I stick a of words wrong on the in the order bunch ...
The first thing your brain starts to do is look for the pattern. A sentence starts with a capital letter so this sentence probably starts with the word 'If' etc. Add to this all the other rules we pick up as part of learning a language and you've a rich tool set to work with.
Then we're back to context. It could be a poem, a limerick, a newspaper headline etc Our brains are constantly looking for meaning in the inputs they receive. Do the words rhyme, is this something that this author would write, does this fit with the other lines.
The iPhone is a popular device with the older generation, and in the first world there's a lot more of them every year. If you really want to increase sales, then targeting the over 50's and their disposable income is probably the right way to go (they may even take the time to give a positive review).
@cadaei You may want to make the font a little larger though ;)