Midiflip challenge

[Tetsuwan Penguin]

I recently found some music on youtube that had been "midi flipped". What this means is that the difference between notes has been inverted, IE: if from note 1 to note 2 we had gone up 5 semitones, when flipped we go down 5 semitones instead.

Here is an example: https://www.youtube.com/watch?v=owmiKa76xCY

So here is the challenge, can someone who plays the piano try "flipping" the Astroboy theme and record it? I wonder what that would sound like!