Most of my points are rather nitpicky. I see why you chose a non-pixelated font, but maybe one could have used one in a way that would have stood out anyway - by movement, size or some background-banner. Mind you, I've never created a trailer before and I do think that your trailer does what it's supposed to do. The main complaint is that it could be shorter and snappier.
Is that abrupt cut between the music also in-game? That was my issue here. Maybe if the last note of the first piece had played a second longer, it would have worked better. But as I said, that's rather nitpicky.
As for the game: It definitely looks like something that I'd like to play. Reminds me a bit of Risk of Rain. I like the way the lion scratches down the buildings. That looks like a fun mechanic.
