TheXTech is an opensource recreation of the engine used in SMBX, which was a fangame that allowed you to make 2D Mario games called episodes, using C++, SDL2, FreeImage and MixerX.
All what I did was follow the perfect instructions on how to build it on Haiku here
And here’s the result, it just works.
It’s very fun, and you can add as many episodes/games as you want.
Just so you know. The software itself doesn’t have any Nintendo-owned sprites or sounds, they are downloaded and put in the right location manually (by me).
Other assets can also be used, like the one called “Adventures of Demo”
If someone is interested in adding the software (the software only) to the depot, or help the developer make it into a neat .hpkg package, that would be cool.