A simple main menu is nice to have, but more importantly this will allow us to properly learn system run conditions and states. Useful links: - https://bevy-cheatbook.github.io/programming/run-criteria.html - https://bevy-cheatbook.github.io/programming/states.html - https://github.com/tbillington/bevy_best_practices?tab=readme-ov-file#system-scheduling