There's another way to unlock everything but the Mystery Mushroom costumes, I believe the update is required for it. You just keep randomly placing blocks everywhere, it's quite a lot of blocks but you'll get an early delivery if you keep at it. After the waiting period I just experimented with the new stuff until that message that tells you to wait the next day shows up, then I continued to more placed blocks until I unlocked more. I repeated it until I got everything within an hour or two, maybe less. No messing with the clock required. I'm not sure but time travel could be faster.
