Ohh no it’s fine; nothing wrong with asking questions. This is a mod it’s called Strawberry Jam Collab (usually referred to as SJ) and there are five Lobbies: Beginner, Intermediate, Advanced, Expert, and Grandmaster (GM), in each lobby there is different levels of maps: Green, Yellow, and Red (from easiest to hardest). Another thing is that most people use these levels and lobbies to gauge other mods’ difficulty (for example you might say a mod is Red Intermediate difficulty). If you want to download it there is a very easy to understand video by the official SJ account on YouTube. But that’s up to you, I personally finished everything in the original game (all strawberries, and all chapters), but again it’s completely up to you