Polychromia

• Added tighter save file validation to prevent the game from crashing in cases where the save file was corrupted. This only affects level progress for levels left unfinished. Completed / unlocked levels are preserved so any progress made is safe. • Fixed a bug where if the restart button was pressed immediately after the level was completed it logged 0 moves and 00:00 time for the level stats • Changed the level stats update to overwritte `0 moves` values to amend cases that were created by the above.