It's playing well! Won on the second try. I like the completeness of the game. Although the shield mechanic seems unnecessary. Playing from cover with dash seems to be enough. The shield expends life force, and the enemies immediately stop shooting at it. There wasn't much time, I understand, but if the environment had been something more than a "training ground", it would have been awesome! The music accompanies so well the intensity and concentration with which you try to survive :D
And if you're not bleeding, then...