Thank you for your visit and suggestions! Regarding the size of the chessboard, I just intuitively set it to 5*5 and did not attempt to make it larger or smaller. But as you said, downsizing to 4*4 is indeed a way to speed up the pace (of course, this also requires more playtests); Shaking those activable tiles after a certain period of time is indeed very useful and I will add it to my to-do list.