This is a difficult subject, since Cheapo style format isn't widely known. If the game was released with image files of traditional looking lemmings and similar graphics to the original game, which Cheapo referred to to generate the graphics, it would likely be in breach of copyright. But since the graphics files are exclusively reserved for Cheapo, it might be different, especially if the graphics files are all downloaded separately. In fact, is that why in the second edition of Cheapo the style files were downloaded separately from the rest of the game, Essman?