Woah! I love the new intro! The little tutorial is great too. The only thing I'd say is to move the sign that says press 'W' to jump a l;ttle more to the left, because you have to jump before you can actually see it.
If there is a way for you to make it so that you can't click outside of the game, that would be nice. There have been a few times when I was trying to shoot this turret and I accidentally clicked outside of the game and it got minimized.