Thanks. It seems I haven't searched hard enough :) I've even initiated a discussion on Reddit regarding using AI images for games ( https://www.reddit.com/r/gamedev/comments/wtpgqo/anyone_using_aigenerated_images_for_games/ ), but usually these images were used alongside other types of images and not as the main content. So, thanks again for finding the other game. I've also updated the description. If you know of any more such game, please let me know. I'm really curious how this technology fits into game design and where this is leading us.
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I do not think I know another such game yet; try searching itch.io (or other game sites) using an appropriate tag, maybe?
I think this technology may be interesting for getting realistic scenery as in your game, but would probably result in a bland lack of originality if it became widespread for any sort of graphics.