A small-ish update this time around.
There are a bunch of new Achievements, and some have been reworked. Check out the list here.
Most of them should kick in if you've already earned them—you should be able to just enter a course where you've already earned an S rank for the appropriate Achievement to activate. Let me know if that doesn't happen.
There was a new course in the works that had some issues, and so it had to be scrapped. Another one's on the way. More Achievements soon, too—probably for some very off-the-wall things.
Also coming soon are, hopefully, some fixes for Steam- and Unity-related issues that some folks are running into. Believe you me; I want the game to actually run like it's supposed to!
Happy Tiring!