I would be super down for a "sexy typing practice" game! Have you seen Z-Type? Something not wholly unakin to that, maybe - on the one hand it'd offer a powerful incentive to keep practicing, and on the other, the conflict between wanting to play the game and wanting to enjoy the pretty art (if pretty art there be) would provide a challenge in its own right.
(I mean I do 100wpm without trying so maybe it should have a hardmode for goobers like me? But still! ❤)