Fixed the issue of three unmatched dice on the board and made the UI more mobile-friendly.

After receiving feedback, I have made the following minor improvements:

1. The problem that when playing until the board is empty with only one dice left, it takes a long time to spawn until a complete match is made, which makes the game lack continuity and boring. I have fixed it by checking the number of dice on the board every time a match is made and destroyed. If it is found that there are fewer than 3 dice, it will immediately add another 11 dice on the board to make about 3 matches.
2. Adding a button to show the leaderboard on the home page so that players can see the highest score that someone has ever set before playing. Previously, the leaderboard had to be played until the space was full and the name was saved before the game could display.
3. Apart from that, there will be minor UI adjustments for vertical display.