I assembled the new base-board featuring the new LED matrix. As the previous one, it also has 4 buttons and a speaker.

Made a silly mistake in the schematics, so had to bodge the LED matrix driver chip a little. Oh well...

Also assembled the power-supply board, it has a tiny 90mAh Li-Ion battery on it, a boost converter and a charging controller which is connected to a power-only USB-C port.

The boards have the exact same dimensions and intended to be on top of each other inside a housing, which I'm going to design and print next. Both assembled boards seem to work fine.

In the meantime, I coded a new game - essentially a clone of the Nintendo Game & Watch Egg game.