Factory. Nice. A rank. Respawning keys! Continuously moving platforms! I don't know how you do it. Moderate difficulty. I felt you could've shortened those top platforms a bit to make it a little tougher. Also maybe higher the lava ceiling then add some spikes here and there to put it to good use. Sometimes the platforms would stop moving after an indeterminate amount of time. I think you have to get the red key a certain amount of times to prevent the platforms from stopping, but I'm not entirely sure what the trick there is.