A leaderboard for that already exists automatically on mobile iirc.

Problem with this is it would have to start upon file creation to be consistent with the other runs. So 80% of the run would be sleeping to spring 13 and then waiting until 9am to enter the festival. Though I wouldn't necessarily be opposed to having a specific category where the timer starts with the start of the minigame...

Maybe actually put in a bit of time into tanks before saying that mission 20 isn't "actually achievable"? Not getting past mission 5 seems to indicate you just put in a few attempts, failed, and called it a day...