Adjusted some game details based on player feedback:
1. The map brightness of Boneyard is slightly increased.
2. The elusive bat i Boneyard has a red outline now, making it easier for players to spot it.
3. Increased the opacity of the ghost, making it easier to identify. (However, elite ghost will still be invisible periodically, so stay vigilant!)
4. Reduced the sound effect when drones attack. When you have 4 drones, it will no longer be deafening.