Great concept well executed! I'm past my precision platformer phase of my life, so done just a couple of levels. Really appreciate the progression with failures to see more of the game. Because everything is so tiny as it shrinks the spikes were suuuper tiny and just overly hard to navigate around.
Music got annoying real quick with all the resets and pitching. It created un-ease, which added to the difficulty - might be what you wanted or not, I had to turn it off to progress.