zlacker

I don't understand the limitation to use all of the pieces exactly once, I'd say the rule to keep valid Tetris moves only is enough. I'm curious what could be built with just that in place.

Right now I especially dislike letters: 'B', 'G', 'I', 'N'. For comparison, I like 'F' and '1', they both look very natural to me; 'A' and 'S' get a pass too. 'Q' gets a special mention for its long tail.

That being said, the project is super cool and looks great already.