Just bought (and quickly received) the little kitty. Soldering was simple but required a lot of precision (small SMD packages) but worked as a charm and became a charming gift :) If there were a more complicated version in the future with multicolour diodes and on-the-fly colour selection...
A great way to see if you are capable of soldering really tiny SMD parts. It is possible to solder the 3 bigger LEDs by eye, but for the 0201 onward you definitely need magnification. Be careful not to drop or lose parts. The smallest resistor is not bigger than a grain of sand.
Things that could be improved: The documentation needs some pictures of the assembled back side. I was not sure how to place U1. On the front side there is unfortunately a text string from the PCB manufacturer. That could have been moved to the back.
Response from blinkyparts | Jan. 31, 2021
thank you for your great review. Indeed, we've managed to remove the order number from the PCB manufacturer. This will be gone in the next batch. Your feedback on the manual is really helping. Rereading the manual I'm realizing "The longer white line (bottom right) on the board marks the direction" does not really help /o\. We've also updated the PCB on this and added a circle to U1 to mark the right direction. Also I will update the manual tomorrow.
I hope you've still had fun!