Ok, I realized that I was supposed to smash the ball into the Red Triangle enemy things, not the blocks! Haha. I assumed because it was like a wrecking ball, my goal was to smash the blocks and avoid the red guys. Maybe you should write on the Itch.io page that you specifically need to smash the ball into the Red Enemies, not just avoid them.
I did run into a bug though, and I think it was a mix of this bug an my misunderstanding of the goal that caused me to get stuck on level 2 before.
So when you hit an enemy the ball seems to "glow" and play a sound for a little bit. on around level 5 I ran into a bug where the ball seems to get "stuck" in the "glow" animation, and then I'm not able to smash the enemies anymore. No matter how hard I hit them, they won't die.
That happened to me on my first play through in Level 2, so I assumed that you just couldn't destroy the enemies.
Anyway, I was able to get up to level 6 this time. Super fun game!