What's on your mind?

[Punn_]

I posted that I will release a "teaser" demo on the first 30 minutes into the game, but because it's nothing but cut scene and tidbit of the story, I'm gonna put in an hour instead..
What I need to know is what do people like to see on a demo? I haven't touch any rpg maker games since 2010 so I forgot the dos and don'ts on this.