I had an idea of a category extension that's completely different than anything else before. You load into a random seed and try to cause a certain number of different sounds to play within the game. I'm thinking that someone could code a script kind of like seedminer that automatically detects when a new unique sound is being played and counts them up until it reaches a certain number (I haven't decided on a specific number yet, but I'm thinking somewhere between 10 and 30.) and automatically pauses your game so the in game timer stops, marking the completion of the run. It would be cool to see people invent new strats like punching cats and ringing bells and crafting redstone stuff to make different sounds.