How was the snowman made?

How was the snowman made?
During year 2022, I've had an idea in my head for quite some time to go back to the erLett project and restart it. Alongside working on Repeat, I was building very small test applications where I was working with the Vulkan API. After a while an idea increasingly teased me: after all, it can't be that difficult to integrate an external physics engine into a simple rendering system that is already working.