He has his prototype page on Hidden Palace :
https://hiddenpalace.org/Laurent
I told myself that I could take a closer look if we couldn't use it to be able to offer much more than that.
When we look in detail and we extract the data it is 250 MB. So there are a lot of places lost
I therefore offer you a modified CDI version of this prototype with almost 500 games (498 to be precise).
All the games start and arrive at the logo, I have not tested them in depth.
For now it is therefore a v1 because there must be some games not to work that I will remove (I will add others instead) for v2
Megadrive Collection v1 (498 jeux)
Megadrive Collection .cdi