honestly kinda funny, but had an annoying bug, I kept getting the pieces stuck into the walls (all of the bigger ones). something I also noticed is that the down button, you can hold down and it would smoothly go down, but when holding down left or right it wouldn't do anything. I would have to click it each square I wanted it to move over in that direction. I did find a visual glitch when you spin a bigger piece when its at the top of the board it clips through to the other squares. I did love the simplification of the upcoming pieces. :)