No hackspace is complete without an arcade game project or two. Usually these projects are time-worn generic cabinets scarred by the frustrated kicks of a million teenagers, the decades-old Japanese CRT monitors inside of which are ready to shuffle off this mortal coil. You are lucky if you catch them on a rare moment of functioning, and their owners are always hovering ready to attend to any soon-to-expire electronics.
It’s a Tetris game in its first incarnation, but there is also a copy of Snake underway for it. If it catches your attention you can write your own games, because all its resources are available in a GitHub repository.