Sure they could, but it would require vastly more work. A Super Earth is a class of small terrestrial exoplanet which is 25%-100% larger in diameter than Earth. Many of these have been discovered and some are in the habitable zone of their parent starts. Which lead people to ask whether a civilization developing on these worlds might be trapped and unable to develop a space program Using Universe Sandbox I show a few example Super Earths and then, in Kerbal Space Program we fly a massive rocket that can just escape.