Unfortunately, I did not share the same experience as fellow players. The original pickup and drop mechanic might have been explained ok, but I didn't actually know it was a lightswitch that used the same button for its interaction. In addition, when I got to the pixel-perfect jumps, I thought that was the wrong solution, and ended up locking myself out.
This is the slight problem with mixing skill and puzzle. In order for skill to be the solution, all other possible solutions must be impossible to execute. You likely didn't intend for me to be able to lock myself out, which means at the bare minimum, a restart action is required.
I'm sorry it turned out this way. Come back in January and try again.