When I think of previews for a game, I think of demos. That's why they're not called trailers. Wait, is that the difference between them? Sorry to bring this down to a 3.95. It's just not that good. I didn't care for the original games.
I love your "Demonic Defence" game much more. It needs more detail. Well, I can't really judge a preview. Especially one for a preview. The text needs to be better.