Wow amazing mini platformer with a sprinkle of puzzle. It’s difficulty is perfect, altho I find the room just before halfway the most difficult. Wonderful aesthetics and animations. The movement is solid smooth and intuitive, one of the best I ever encountered in an indie game. You are a genius making this in 60 hours! Also benevolence: spikes are friendly if you touch them carefully :D 
True, but at times these spike-lands can be just as annoying as actual spikes, usually by getting in the way of a high-speed portal flip combo. The area is also a bit too small to be easily exploitable, though I suppose with enough practice one could use this to jump across alternating blocks of spikes...