Creative idea pretty well executed. Although I somehow survived for 8m15s my first attempt so something odd is going on considering the dev high score is 3 minutes and change.
Oh no! I realised I wasn't adjusting the ceiling's fall speed by the frame time, which is why it was going slow for you (and somebody else told me they survived for 40 seconds which confused me). Thanks so much for pointing that out. I feel stupid now haha.