Ludo Battle

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1. Added backpack system
2. Added reward treasure box system
3. Added various reward logics for background configuration
4. Added dice skins and applied them to the game
5. Added chessboard skins and applied them to the game
6. Added chess piece skins and applied them to the game
7. Added ranking system, daily ranking, weekly ranking, and increased ranking rewards
8. Added multiple modes to obtain dice, chessboard, flag skins (currency, sieve, lottery)
9. Optimized known bugs in matching games