This ROM hack retains the existing game and adds a ton of new, creative content all around it. It's a popular ROM hack in Japan, and remained in Japan due to being only in Japanese. However, thanks to Mato/Tomato (responsible for many popular fan translations) this awesome hack is available in English!
I don't have more English screenshots. I want to show you more of this awesome hack, so here are some Japanese screenshots. Take note, though, that this hack is 100% translated to English. Hence, the parts of the game shown below are in English when you play this game.