I still do not fully understand why what I did in the first 5ish levels worked, and the levels are difficult in that they require precision and forethought, but the rewind mechanic removes most of the tedium most "precision" platformers give. I have a few nitpicks I would have chosen to implement slightly differently, but to do so would erode at the pure soul presented here. Each level is crafted around the mechanics being exactly as they are, and does so well while not overstaying its welcome.