Couldn't complete the room because of this. The black bishop fell out of the map and I was not able to get it back so I couldn't solve the puzzle and therefore couldn't accomplish the map. I didn't want to play the entire map from the start again so I quit and deleted this buggy ♥♥♥♥. There were also some other minor errors I discovered while playing it. But the black bishop was definitely a gamebreaking one. But... silence. The creator of the map doesn't seem to care anymore. The bugs are still not fixed 6 months later and the release of Part 5 is long overdue.