From the Designer's Website:
If you want the basic, stripped down version, you can't buy it, but you can get it for free. ...in Spaaace! was crowd-funded by my friendly and well-groomed fans.
For the truly determined consumer, however, the next phase of the game's development is complete. Dinosaurs...in Spaaace! takes the base game and adds a Fonzie-friendly 1950s setting complete with rocket ships, laser blasters, time travel, displaced Aztecs and aliens with odious grooming habits. If you ever wanted to invade a secret asteroid dinosaur ranch, this is an opportunity you cannot afford to miss.