That's a good idea, modding something open source. Like maybe changing a game to be something different, new rules, graphics, sounds, etc. The SNES games woul

That's a good idea, modding something open source. Like maybe changing a game to be something different, new rules, graphics, sounds, etc. The SNES games would be probably way different than modern phone/web/tablet games. On the SNES you are dealing with a single process device so code can be more rudimentary, some of it probably in assembly. On newer devices you will find are built higher level languages (c, python, c#, etc) with code that plays nice with other processes in the device, as well as modern graphics/sound methods. If you are planning to ultimately do code on modern devices, that's probably a good place to start.