Probably they were in a rush so they dropped the original art to AI to generate some missing screens. Sad, but still a good game and a lot of human work has been done there.
That sounds so much more sad though, feeding your own work to ai, the game would already be amazing without it :( All ai does is undermine the trust among creators and being unfair to those of us who had to make sacrifices due to the time limit we all had.