猜测因为游戏31关右下角写有 undefined 未定义 即游戏内容未定义 游戏因此不能进行 导致无法过关
找到外国爱好者的两句讨论
A：There is a stage 31,but since its name is "undefined" and it's impossible to win（与我理解的意思差不多）,I think it's a glitch.
B：its not a glitch
it was meant to be there guys
he put that level in the game
and no one knows if it can be beaten