Place your modified files in atmosphere/contents/[TitleID]/romfs/ . The game will load your new features instead of the original ones when it boots.
Use on a custom firmware (CFW) Switch (like Atmosphere). Lil Gator Game (NSP)(Update 1.0.1).rar
Depending on what "feature" you want to add, you have two main paths: Lil Gator Game (NSP)(Update 1.0.1).rar
Use a utility like WinRAR or 7-Zip to extract the .nsp file. Lil Gator Game (NSP)(Update 1.0.1).rar
To develop features, you first need to access the game's internal data.
APK Downloader