Ok I think how the story goes:
Since then, Crazyblox and Guide were friends and developing FE1. Ghostlyx_x heard the game and played it. He was a big fan. He saw the guide being a helper, and probably Ghostlyx_x was jealous. Then both Guide and the Ghostlyx_x got into a fight. Ghostlyx_x was enraged that he wanted to destroy the FE1 facility. Now players go through the FE1 during the destruction which it is called “Familiar Ruins.” After “Familiar Ruins” players now go through “Beneath the Ruins.” During the destruction, Crazyblox was finding the Guide and he was nowhere seen, and Crazyblox thought that he died of the destruction. After that, Crazyblox started to develop FE2. Since then, Guide was hiding in FE1, trying to survive. The Guide heard that Crazyblox is developing FE2 (as seen in Figure 1) and he feels sad and stressed because he is living down here (Figure 2). As Crazyblox is developing FE2, Ghostlyx_x said to Crazy that he wants to be a Guide (Figure 3). And then this is the present time.
So probably one of the ways Ghostlyx_x could have destroyed the facility is probably the Power Tower in Flood Escape in Room 3 in Easy.
The story might be edited because of updates in FE2 and possibly FE1
And here’s my web map just because why not