If your game is crashing or a "piece" of the menu is missing, ensure you are not using a save file from a significantly older version, as these often cause corruption in newer builds like 0.6.4. Are you stuck on a specific puzzle (like the statues), or
If you are stuck on a specific "piece" or puzzle in the game, here are the most common solutions based on player guides: Common Progression Blocks LustHunter-0.6.4-pc.zip
If the "piece" refers to a mechanical puzzle involving statues, you must rotate them to line them up with the boxes located near each statue to open nearby doors. If your game is crashing or a "piece"