While the core mechanic is really cool and well done and the style is overall alright, precision platformer was not the genre for this mechanic. Maybe it could be alleviated a little if the past lives had a bit of a head-start on your current life, so you could move quickly without being completely blind. But the level of precision demanded in a couple sections was bordering on rage game levels, exacerbated by the high jump mechanic being a bit unwieldy. I can understand wanting to minimise the number of controls, but I think control for the high jump could have been improved somehow. The amount of times I died because of it was far too high, even after figuring out I could hold space before I land. The final section was pretty mean. I admit to starting to get frustrated with it.

Really cool game though! To be clear, I finished and enjoyed it. Some tighter controls and maybe easing up the precision a little are my main suggestions.

Cool central mechanic. Really satisfying to see all your past clones running around (like in super meat boy) but in this game they are actually useful too!