Hmmm, something this minimalist would normally piss me off.

But i will say this... this is actually a pretty decent physics test.

Good sense of gravity and velocity when things inevitably go boom.

My qualms come with the controls, i feel this would work better if the main way to see things go flying in all directions was to hit right click which then pulls down the control menu for Unity, kinda annoying other then that you just stack things and when you tire of your creation watch it go flying as wonderful geometric shrapnel.

You might have something here, if you continue to explore the idea.

All in all, not bad for a few hours of coding.