@vutronic when you say the end is near in your description I immediately think of the four horseman. If you're dead set on keeping the twilight name, how about Twilight Horseman.
In your video, I'm not sure if this is due to the recording but things seemed a bit slow. For example the bird animations seem like they could flap a bit faster and the boulders could come at you quicker making it more exciting. That's why I'm thinking it could be the recording, because to me, it seems like everything is at 2/3rds the speed.