Honestly at this point, just change these files
GAMELOADINGSPLASH="/storage/.config/splash/loading-game.png"
DEFAULTSPLASH="/storage/.config/splash/splash-1080.png"
You will get the splash you want when loading a game and when returning to ES.
Or copy the /usr/bin/show_splash.sh file to /emuelec/bin and edit it to point it to whatever files you have, but like I said, bootlogo cannot be changed unless you recompile.
I know you mean well for your daughter, but the bootlogo is made hard to change for a reason.