I've done some initial work over the weekend porting one of your games, G&W Factory, to RetroFab :) You can preview it here.
I'm not sure when I'll start working on the gameplay, but you can at least see what the device, packaging and instructions will look like. ACL is the only function that currently works on the device to turn on the sprites. And you can switch to the RetroFab (color) version of the screen artwork by pressing [TAB]. Feel free to let me know if you have any issues or suggestions.
I've implemented the gameplay for G&W Factory :)
Thank you for sharing your amazing work!
The RetroFab version is now available to playtest here.
Let me know if you have any issues or find any bugs.
For the most part it should play similar to your version with the following small differences:
I've also made some minor changes to the instruction guide, mostly replacing "g&w-case" with "G&W case", and fixing a few minor typos.
Wow, great job! Thank you for this opportunity. The gameplay is a little more difficult because of a reaction delay, but once adapted, and playing a fraction ahaid, it plays very nice. Don't mind the changes you made. Found only one issue so far : @ game B Mario should be able to fall from the loading dock at the bottom, which is not possible yet. If Mario does so in my version, while holding a g&w-case, the g&w-case gets loaded on the truck as he falls. Thanks again, well done, love it.
Oh, thanks! I completely missed Mario being able to fall off the bottom-most girder.
I've updated the build with a fix :)
Thanks for the feedback! I've uploaded a new build that should improve on the consistency of the order and sequencing of the cases. I've tried something to fix the issue with the arm movement, although some of it may be down the lower precision of the interval timer when the frame rate is low. Let me know if you see any improvement for both issues.
New reply from Florent Gorges :
Well, MU-21 is a private joke with my wife ^^
In Japanese, MU-21 can be readed "Munii". And Munii is the favorite rabbit puppet of my wife (when she was a child)
that's all ^^
one detail, the book and illustration copyright is not Pix'n Love anymore. It's "Omake Books Publishing" 
Great find Flyzy! I've posted on reddit asking the creator if they would be willing to help make it happen. It would be a really cool follow up to G&W Factory. It would be even more amazing if he would be willing to design the manual as well!
Found a playable version, apparently from another artist (Eventlesstew)
, here : https://www.reddit.com/r/gameandwatch/comments/120x4rx/pacman_but_its_on_the_gam...
Not quite the same though, but might be helpful for the gameplay.
Thanks for the suggestion Claudio! It's on my list of games to add. I just need to find a scan of the instructions. See this post about it.
An initial build of Grandfather Mario is available to test here :) Let me know if you find any bugs or would like me to make any changes/improvements.
Wow, great job already. I think the back should be blue, the same color as the front plate, like most new wide screen versions, what do you think. I assume the alarm isn't meant to be able to be set, no problem, probably nobody ever does. :D The gameplay seems to be running nicely, gonna test some more next couple of days.
Noticed, when the game is running and ACL is pressed, you can still move Grandpa Mario, which gives a strange effect. (see pic)
Thanks! Yeah, all machines on RetroFab just have a demo of the alarm rather being able to set it. Also you can't set the time. Changing the back color and fixing the ACL issue should be easy. Just let me know when you've finished testing some more and I'll do another build with these and fixes for any other bugs you find :)
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