I’ve started to understand how MCreator works. I’ve made the main menu and added gamemode changing menu and time menu including different moons. I’ve also added a achievement (advancement) that you need to use the mod menu(Command: /givemod Permission Level: 4 Link to Permission MC Wiki page). Problem is to remove the achievement you need to remove all achievements as there is not a procedure block and the /advancement revoke command does not work as I can’t find the achievement.
Tomorrow I will look into better methods to block the menu for some people and add stop/start daylight cycle to the time menu and weather, difficulty and look at compiling a proper order list of what goes where and in what menus (like player settings, world settings, etc…)
