OMG, I literarily have a similar game in my drafts that I made a year ago. Great game! Much more refined than mine. Although the game has some bugs and the player movement is a bit floaty, (I could just jump and cross some levels without the clones), still enjoyed it. Love a puzzle platformer, I made one too for the jam!

Cool game, though I found a few glitches. I cannot beat level 10, I think the wall is supposed to become transparent when I hit the switch, but that's not happening so I can't get to the door, also you can wall jump in that level for some reason. There was also a few times where the doors disappeared, but I could guess where it was supposed to be and the trigger to the next level was still there. 

Another thing is I think you should've made the main character more of a square shape rather than a tall rectangle if you wanted to do platforming on their head, it would make it a lot easier to platform that way. 

I also think a lot of the levels felt the same, you make a recording of you standing still, stand on yourself and then jump to the exit. I like that you can scrub through the recording. The gifs show how to use that, but I never thought to do it and just started from the beginning every time. 

Very cool game, especially when made for a gamejam. I have seen the mechanic before, but still a fun game. Good job.