This video is more screwing around than anything -
This thing can generate infinitely random levels and only requires
One script
One model
Two textures
I dumped my old "detachable limbs" project into this one to make it less boring to test, so it uses a bit more than what's described above.
How it came to be:
I thought I'd make a simple platformer to play around with. Being as lazy as I am I naturally had to make something that'd design the levels for me. It's not god-knows-how fancy, but it's only a single script, and it gets the job done fairly well.