OHR is a puzzle and platform game, based on both classical mechanics and tangible interaction, powered by Unity3D and a custom-built hardware interface called Radiant Square (Radiant 2 ). OHR tells the tale of Spark, an electronic life form, which wakes up in an electronic components dump, trying to exit from it. Players will help Spark to solve puzzles placed throughout the game world using the provided game elements, represented as physical electronic components, by placing them on the Radiant 2 . Thanks to both the game design and Radiant 2 each puzzle can be solved in different ways, allowing the players to explore various solutions. A video presentation of OHR and Radiant 2 can be found at: