WASD to move mouse to shoot. I've added a health bar, and if you are willing to sacrifice some of it, all enemies on screen will be killed! There is a bad side to this though! If you touch an enemy, your score will change by -3. For a Boss, it's -5!
This took me FOREVER to make, PLEASE heart and fav! Check out the second version! https://scratch.mit.edu/projects/1021757422/