I started a world and I named it "World 1". I hopped into the world but it was not letting me move. I exited the world but it was named "Error 404". I went back on and my skin dissapeared. I figured it was a glitch so I just tried to play like normal but when I moved the game made a SCREEEEECH noise and my game crashed. When I got back on the world was named "Users/FireEnder1/AppData/Roaming/.minecraft/worlds/WORLD_NOT_FOUND". I was seriously thinking about just not playing but I decided to get on any way. I got on and everything was normal. But when it turned night the mobs flashed from being invisible to visible. The Moon was red and it shaked. I tried to hit a zombie but my sword dissapeared and the game crashed. The game made the same SCREEEEECH sound and the game crashed. But then my computer crashed and when I got on all my files were either deleted or corrupted.