I did make the simple sketches containing only rectangles and text myself and used some icons from the internet.
The tech tree diagram (3rd image) shows in what order technology should meaningfully be developed. You need electricity to excavate water (which you can get from hydrated minerals) which is an important resource that you can use to generate oxygen through electrolysis, grow plants/algae in greenhouses, and produce methane and plastics from hydrogen (also from electrolysis of water) and carbon dioxide.
The greenhouses on this photo grow algae, which are bacteria that do photosynthesis and produce biomass, which is very protein-rich and calorie-rich btw. The advantage of using algae instead of cereals (like wheat or maize) is that algae take very little space, so a flat and non-bulky greenhouse can work, which facilitates construction. For a balanced diet, i recommend adding vegetables and spices which might be grown inside the ship under LED lamps.
