So I was playing your game just now on my browser and it seems a lil broken. I was in the second area where you introduce the mechanic of cutting and pasting code and yeah that was simple enough but when I pasted the code and tried jumping onto the new platform, I just bugged out and the screen turned all gray and it took a lot of fiddling around just to get it working again.
Once i did get it working, I went into the next room and yeah, I couldn't accomplish it. I think you were somehow supposed to rotate that moving slab but I just couldn't do it? and if I was supposed to pick the power-up where the instructions were, then I just couldn't get there. And if I'm still missing something then damn, guess I got a monkey brain. Eventually, after walking around the room a lot, I glitched through something and the same thing as earlier happened, the screen turned all gray.
That's just what happened with the WebGL version, idk if the same bug happens in the downloadable.
I personally had problems with WebGL compared to just making a downloadable (which you have done too). If the downloadable works better then cool, but I won't be downloading it unfortunately for personal reasons. No hard feelings, but yeah, what you have going is definitely interesting.