For some reason when I download the demo nothing comes up but a little screen that says hello

is there a reason for that, if not did I do something wrong?

I haven't bought it yet, because well i can't. I loved the game in all its faults and I would love to buy i now, but I can't because I am not allowed to. If there was some way that after a while it could be free that would be awesome. But as of now I am not all for it to cause money. I just have one...