How you're probably supposed to play: Strategically shoot a few balls, and carefully dodge while they do their thing.
How I played it: Shoot so many balls that the level is over before they can kill you.
I seriously had so much fun with this, it's suuuuch a clever premise and it's nice that it challenges you from a strategy perspective early on, and depending on how strategic you were, challenges you from an action perspective as well.
You did a great job making this super crisp and juicy with minimal assets, very clever use of your own time. I love it.