I was trying a new technique where I use the arow keys/enter for the sticky keys skip rather than the mouse (old habits die hard). I reached room 250 and I tried to skip the cutscene using this method. For some reason, after the sticky keys prompt went away, the cutscene kept going. I tried to activate sticky keys again and the ease of access window was slow to pop up, and somehow specimen 9 got to me and killed me?
I don't know what caused this glitch, I couldn't have spent enough time in the room for specimen 9 to spawn, the cutscene hadn't even finished yet when I tried to use sticky keys again. Maybe something in the source code of the game?
It's been brought up several times before, but there hasn't really been any suggestions on how to add the retro level pack. Several different games have dlcs as categories for their runs, but since Roblox is a different type of game I would suggest the retro levels as a "Misc." category similar to Spooky's Jumpscare Mansion's Karamari Hospital DLC