It has been a long time since, I felt such freedom in game. Last time was in starcraft's map creation, as for Elin. It gives you a great freedom to do many things, from killing the end boss with a bitchball to making food out of steel. if you like to find the many secrets of games, beware this game will suck your time dry. As for why it should be in GOG? well its a unique japanese game that has the many crazy outcomes of old games. and I mean text old games.