Currently supports some games for Taito Type X, X+, X2, X3, and X4. TeknoParrot offers an out-of-the-box solution for running Windows-based arcade games. There's more info about tools and games here. Also, some shmup games for the original Type X need an extra fix.
For saving scores, you'll need to use save fixes on a per-game basis, 'Loaders Pack' has fixes for many games.