Tetris-omino Cookie Cutters

I've wanted to make Tetris cookies for a while, but couldn't find a decent set of cutters for sale online. I saw a few already here on Thingiverse, but I wanted a different feature set than I was seeing... namely a flange to push down on, and block separations.
I also originally thought (like Woolfie99) that stamping all the pieces out at once would be a good idea... but came to realize that part of the fun is choosing which pieces to nest to the previous ones you've cut to maximize your dough