GG的啊，不知道找得到找不到。

找到了，可以选关和无敌。

Secrets
Level Select/Invincibility
At the Options screen, choose Sound Test, and then select number 11. Press 1 and 2 at the same time. Change the ''Damage'' option off for invincibility, and set the ''Start Stage'' on to choose a level.

我英文不好，就不翻了:D