Hey there, we've posted a video on youtube that shows the latest Pixelmash features, in case you haven't seen it. These features were included in the first version of Pixelmash on Steam, but aren't detailed in the original how-to video on Youtube. Here are the links:
New features in Pixelmash 1.0.11: https://www.youtube.com/watch?v=l8rizLRK0lY
Original full walkthrough video for Pixelmash 1.0.01: https://www.youtube.com/watch?v=-xcXS73nofE