I was going to remake some more of your levels, but I guess I'll do the MIDIs first.
Just so you know, if you do remake some of the others (and I'd be very happy if you did), I've made a slight change to "Lift us up where we belong" / "Just a Minute Part Four" to eliminate a couple of backroutes. I changed the square metal plate under the trapdoor to a vertical rectangular one, still touching the wall with a space on its left.
Oh, and I found a 100% solution to "We'll meet again"! I surprise myself sometimes......