The IS31FL3733 has double the pins of IS31FL3736, so you get double fun! This board was also finished and assembled for some time, but I couldn't get it to work. Today I checked dug it out to try the capacitor trick, but it already has the decoupling capacitor. But once I had it out, I did some more experimenting and sure enough, I had the SDA and SCL pins swapped on it!
This board was pretty hard to route -- it's a lot of pins, and it's not like they are arranged with any logic. In the end I couldn't find a way to route the last 4 traces, so I just made two 4-pin headers, and then connected them with wires. It works, and that's what counts.
The colors in the photos are of course all wrong -- because the camera sees colors differently than human eye. In reality all the pixels are red, with different brightness -- not yellow.
I guess now I need to write the code for playing a movie on this, or at least some animated gifs...