Demo Tips
From Kerbal Space Program Wiki
Demo Version Tips and Strategies. In the demo version of the Kerbal Space Program, the majority of features are removed, with only a few planets/moons left on the game.
It is extremely hard to break through Kerbal's relatively strong gravity without losing control. In this guide, there will be tips for you so you can leave the planet "finally". This Wiki Page needs pictures and other customizations, so please do not refrain from adding your own experiences that could help players.
My aim is not to discourage players from getting the full game, it is to encourage them to get the best out of the demo so they can have a taste of the features the full version offers.