Don't Get Fired is an extremely tiny text-based game I made when I originally installed Python, where you have to make basic decisions about what you need to do before you show up to work, such as actively making the decision to eat breakfast so you don't starve on the way there. There are seven different endings, only one that doesn't involve getting fired.
The original version was very inefficient, almost entirely built on 'if' statements, so one year later, I rewrote it, making heavy use of subroutines to significantly decrease the number of lines used, creating a far more logical structure.