Just click the Generate Plant button and hover your mouse over the planet to see its randomised stats. If you want to only generate one type of planet, go to 'Planet Type' sprite and change both the numbers in the random number generator at the top to 1 - Rocky 2 - Liquid 3 - Gas 4 - Ice 5 - Lava 6 - Continental Life is roughly as follows - Single-celled - Obvious Complex - Plants (+SC) Sentient - Animals (+plants and SC) Intelligent - Human-level (+Animals, plants, and SC)
The planet sprite used is from 'Planet Generator' by Zarkonnen