It's a little frustrating the game does not come with "Reset your progress" button. It's totally replayable if enough years went by. Luckily, it is not too difficult to do it yourself.

- Activate Steam's offline mode
- Manage - Browse local files
- Delete / rename "config"
- Launch the game. You should see all the progress reset now
- Exit the game
- Turn off "Offline mode"
- Launch the game again
- You get a "Cloud Conflict" message, choose "Local Save"
- Enjoy your reset game.