  In level co-creation an AI and human work together to create a video game
level. One open challenge in level co-creation is how to empower human users to
ensure particular qualities of the final level, such as challenge. There has
been significant prior research into automated pathing and automated
playtesting for video game levels, but not in how to incorporate these into
tools. In this demonstration we present an improvement of the Morai Maker
mixed-initiative level editor for Super Mario Bros. that includes automated
pathing and challenge approximation features.
