2 of 5 stars.
Usually I consider something a vignette if it has less plot than a tale or short story. In this case, it’s more a mere extended metaphor or a kernel of an idea that is not developed into something further. Thankfully it not made into something more, in this case, as there is no story here in this seemingly absurdist–metaphor.
Peter and Gina set out to make a monster to take the world by storm. No holds barred, they will give it every tool to succeed: claws, tentacles, a beak. They don’t want to hobble it with definitions of what a monster should be: bilaterally symmetrical, engendered, organically functioning. But practicality gets in the way as does their own experiences and biases. So they remove some odd parts, and start to reshape their creation into something more recognizable.
So when they open they open the garage to reveal their monster to the larger world, they end up sending her to kindergarten with all the other children. [Spoiler alert on that last sentence. But then again, it’d have to be a surprise to be spoiled.]