Press space to do an action. Build can make house, mine, forest, and farm You start with 5 Unsheltered, which can't be assigned jobs, but once you build a house for them they become Villagers Assign your Villagers jobs and watch your Wood, Rocks, Seeds, and Food grow (if you're decent), I guess Not a game (unless I want to make it one :D)
Swapping out all the variables for one long list would be more efficient, but would be more difficult and harder to see than just all the variables.