Most research on game making has focused on designing digital games, as opposed to incorporating the potential for the designs of peripherals and controllers. In this paper, we illustrate how youth created wearable and physically interactive controllers by combining digital and tangible construction kits: Scratch, ModKit, the MaKey MaKey, and the Lilypad Arduino. In an eight-session workshop, 14-15-year old youth coded and created their own Scratch games and created wearable or electronic textile-based bidirectionally responsive game controllers using sensors to activate a response on the screen, through the physical artifact, or both interfaces. We analyzed students' design of game controllers, as well as post-workshop interviews, to understand how they articulated an understanding of bidirectionally responsive design and its affordances, focusing on a case study. In the discussion we address some of the insights and challenges presented through the workshop, and offer suggestions for future work. Copyright is held by the author(s).