Last year I did a MegaDrive game (or Genesis if you wish) for a couple of friends that were getting married. It was pretty much done in a rush and therefore has bugs here and there and it's a bit dodgy overall. But works!
You can find the repo at github as usual and here I will leave some screenshots:
This is the cartridge I created for them too, with a nice box too
And becase it would be boring to just write a post about it, here you can... play it! This runs the Retroarch emulation (with the Genesis Plus GX emulator running MD games) targeted for Emscripten. Brought to you by Emulatrix. Enjoy!