Seems like quite a bit of hardware engineering went into the design.
But if you are hacker and don't care too much about the aesthetics you could probably get 90% of the functionality with an ESP32, a GPIO extender, an LED array, an OLED display and a 3D printed case for like $30.
But if you are hacker and don't care too much about the aesthetics you could probably get 90% of the functionality with an ESP32, a GPIO extender, an LED array, an OLED display and a 3D printed case for like $30.