First of all, the startup scene is great!
As soon as I entered the game, I discovered the problem which is the character cannot shoot backwards. (He will attack himself!)
I remember that Abe provided a script to fix this problem. You can find it in Discord channel, Unity>New_mechanics, and the name is "reverseShoot.cs".
When the game over, the screen froze, and I had to refresh the web page to restart the game. Maybe you need a restart button?
Also, when the character shoots an enemy, the score in the upper right corner is zero, I think this is not what you want. But, because I also encountered the same problem, I don't know how to solve it.
Other than that, I think there are no other problems. Your character animation is great! I like the way he yells when he attacks.