"Function introduction
Currently implemented
Beautiful homepage with gradient background

Modern UI design with rounded buttons

Game interface with toolbar and game information display

Responsive layout design

Written entirely in Java (no third-party libraries)

Plan realized
?? 3x3, 4x4, 5x5 puzzle board sizes

?? Touch-based movement of puzzle pieces

?? Movement steps and timer display

?? Game state persistence

?? High score list system

?? Settings and personalization options

??Sound effects and animation effects

??Multiple difficulty levels"