- Initialized the snes_tile8 structure to zero in UnpackBppTile for safety.
- Reordered loops in UnpackBppTile to process rows before columns, improving readability.
- Corrected bit manipulation logic in both UnpackBppTile and PackBppTile to ensure accurate color value handling.
- Enhanced test cases for 2bpp and 4bpp tile unpacking to validate expected results, improving test coverage.