It will be unlocked after reaching the level.
There is no time limit for challenging levels. You can participate after unlocking the level. Gourmet Little Master is a business simulation game with food as the theme. The game interface adopts cartoon characters. In the game, the player plays the role of a girl at a pancake stall. The player needs to serve customers quickly, deliver more dishes, and then upgrade the ingredients to create more combos to serve and obtain additional gold coin rewards.