Haha! There's so much potential here. I wanted the boulders to be better at killing the gummies, I guess setup so that they roll towards the gummies rather than across their path. The level being a bit tighter might have allowed for this.
I'd also like a bit more hit-stun on the gummies. It felt like they could jiggle more in reaction to being shot (though the fact that they did jiggle was pretty satisfying)