A free game created to learn Unity. It features the Starbug from Red Dwarf. It's cold outside, there's no kind of atmosphere. But that's okay, you're just flying around in the cargo bay, moving crates around. A game set in the world of Blue Dwarf, a text-based game where the ongoing story is created by its members.
This was the project I was using to learn Unity, I was happy with how easy it was to add physics to objects, like these crates.