OMG ⑨ is the best! So cute!!!
It's Cirno Day today, so I figured I ought to kick my rear into gear and get that update out already.
Special Mode adds not only a difficulty increase for those who may have wanted a bit more of a challenge, but a whole host of changes to the look and sounds of the game. There's more enemy types (including several more Touhou characters in place of a few of the nameless fairies), a new ending, new music... Try it out!
And, for the people who couldn't finish the original game and missed out on some stuff in the original game, there's a new Relax Mode with more generous healing, a bit of a power boost to Cirno's shots, and a checkpoint in the final boss battle.
Naturally there's a bunch of other less noticeable updates along with this (QoL changes and bug fixes, the usual).