"What you need to know about your audience here is that they will watch the show, perhaps on their mobile phone, or on a second or third screen while doing something else and talking to their friends, so you need to both show and tell, you need to say much more than you would normally say."

This is so baffling to me. So you've discovered your audience has a limited attention span. I can see that. But for the love of all that is holy, if you know this, why even make a game with a story in the first place? The thing with videogames is that stories can be minimalistic as all hell, or even optional. Just let the gameplay speak for itself and have the story be "defeat the bad guy on the mountain" or something.