Well, after buying 74HC595 shift register, you are left with only one option - build a LED matrix. And that’s what I have done in these hot days. To spice things up I added push button with whom you can control integrated LED matrix animations (algorithms? sprites?).
What can I say - it already was blast to solder my first stripboard, but 4x4 LED grid made it even more fun and frustrating (stuffs doesn’t work always :)