laser.c: replace DEBUGCODE with DEBUGMSG whenever possible
playgame.c: replace DEBUGCODE with DEBUGMSG whenever possible
practice.c: replace DEBUGCODE with DEBUGMSG whenever possible
alphabet.c: replace DEBUGCODE with DEBUGMSG whenever possible
editor.c: replace DEBUGCODE with DEBUGMSG whenever possible
titlescreen.c: replace DEBUGCODE with DEBUGMSG whenever possible
SDL_extras.c: replace DEBUGCODE with DEBUGMSG whenever possible