The source code for Ocean Software’s Mr Do! port to the Game Boy has been officially released by two of the original developers. Description from Paul Hughes 1
Many moons ago I debugged and finished off Ocean's Mr Do! for the original Game Boy.
As **Joffa**, the late, great original author, decided to release the source code,
I thought I'd also put it up.
The header for the source file also mentions **Wesley Knackets&& developed it between the 28th of June and the 5th of September 1990, which is just a little over 2 months!
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* MR DO! (C) 1990 SPECIAL FX SOFTWARE LIMITED *
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* BY WESLEY KNACKERS *
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* START DATE 28/06/90 *
* LAST DATE 05/09/90 *
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Known developers:
It was started on Special FX’s own Gameboy assembler and hardware and was finished on Ocean’s own Atari ST based assembler and hardware.
— Paul Hughes (@PaulieHughes) February 22, 2020
http://www.pauliehughes.com/downloads/index.html ↩