Throughout the years, many code literacy initiatives have focused on games for children that illustrate the fundamental programming concepts in an abstract fashion. Many of these game-like educational tools, influenced by the popular "Hour of Code" web game, are based on grid-based movements that are well-suited both for digital activities and for physical games with multiple participants.

CodyMaze is an educational game, first developed in 2017, that combines physical movement with basic programming concepts to develop computational thinking. Players navigate a virtual maze overlaid on a real-world 5x5 grid, where each cell contains a QR code. By scanning these codes and following instructions, players move through the maze, executing sequences of commands that introduce programming constructs with growing complexity.

The game is designed to be played on a large scale grid, which can be represented in a variety of ways, such as tape on the ground or cardboard boxes. Players move from one cell to another in order to reach their next destination, which is provided as a sequence of instructions that must be followed correctly in order to advance. This setup encourages active participation and helps players understand programming logic in an engaging manner. CodyMaze has been utilized in various educational settings, including schools and public events, to promote coding literacy among students and the general public.

In response to the COVID-19 pandemic, adaptations of CodyMaze have been made to facilitate at-home or classroom play. For instance, Mirabilandia, an amusement park in central Italy, collaborated to create a version of CodyMaze that can be set up in schools or homes, providing downloadable kits and a dedicated app to recreate the experience outside the park. Thematic versions were developed, among others, for INAF and to support the Neoconnessi digital literacy campaign.

In this paper we discuss the evolution of CodyMaze throughout the past years, we describe noteworthy installations and events, we present the features of the new CodyMaze web app, and we discuss usage statistics from the last 4 years.

Keywords: Code literacy, hour of code, coding, education.