IMO there's nothing wrong with using the RTP as long as it serves its purpose. Why do so many people have "problems" with the RTP? I'm curious, as not everyone is a pixel artist or graphics designer. Sometimes having so many different styles of tilesets will have an adverse effect on aesthetics. I know that from previous experimentation. To me, as long as a game plays well and the storyline is compelling, who cares if the RTP has been used!