It's been a while since my last update. In that time, I've been working on a few projects here in there. As for MEGA_MATRIX, I've added support for the Arduino MEGA and have been able to do a few proof of concept stuff for the Raspberry Pi. The Pi version right now can get a whopping 20K FPS in the native C version! The Pi version isn't too functional right now, but expect soon enough. Link to source on GitHub.
Since the end of the summer, I've been working on my own Animation tool. It's not much right now, but you can find Linux and OS X binaries right over here. Here's the first thing I was able to make with it, a bouncing ball: