Added a new compatibility layer (powered by XSeries) so one jar now runs from 1.12 right through to 1.21.8 without material or sound name crashes.​

Fixed the Hiscore GUI: per-player heads render again, the rank counter increments properly, and filler items no longer break on legacy versions.​

Hologram admin commands now validate their arguments and reply with usage hints instead of throwing errors when something is mistyped.​

Improved MySQL bootstrap: the players table is created with a valid schema, connections close cleanly, and startup now preloads hi-scores even for flat-file users.​

PlaceholderAPI expansion reports live plugin version info and gracefully handles missing ranks (returns "N/A" or "0" instead of erroring).​

Unified game start sounds across versions by mapping configured sound names through the compatibility layer.​

Removed the hard-coded api-version flag to keep backwards compatibility with 1.12 while still playing nicely with modern servers.​

General polish passes on score handling, hologram refreshes, and console logging (especially after /reload).​