Hey Feisty!
I love the cat in sunglasses giving the instructions. I also must have been too distracted by it because I didn't read the tutorial and thought I had to DODGE the balls (like the classic Godot tutorial "dodge the Creeps"). I thought it was a neat game, I liked the retro arcade style.
Someone else pointed out you can pretty reliably just camp in the middle. If you wanted to expand on this in the future you could add additional temporary walls/spikes or enemies that apply MUCH more force to the player.