I think i spotted some sorta bug here... If you start writing down a code and then without pressing enter click 'Start' will the text still be visible.

I'm actually working on a big upload right now so i should probably see on that too 'cause else could some of the faster ones run through without a chance of killing 'em.

I just found out that in the level where you get the boomerang sword skill can you use the 2nd switch by jumping through the roof. You should maybe try it yourself.