Hey @Mitsuperboy, thank you for supporting MAKERbuino and welcome to the forum.
If you want to change the splash screen, you’ll have to edit the bitmap in LOADER.HEX’s source code and compile the custom version of the program. After that, you’ll have to replace the old LOADER.HEX found on your SD card with your new custom made file.
LOADER.HEX’s source files can be found in the examples section of the Gamebuino library. You can also check it out on GitHub here: