The rules make it so every new tetris release is just a boring clone. TGM has to fight for innovation, really sad. When I made my four player variant, https://duo.itch.io/reaktor I made sure to follow NONE of the guideline rules, and it ended up being a breath of fresh air for a lot of people. https://www.reddit.com/r/gamedev/comments/1fdzcsc/how_i_publ...