Greetings,

While playing The Cemetery stage 2 I found the secret lever. I was able to reactivate it multiple times. This had no adverse effects on gameplay but when I reached the end of the level I found my secrets counter was "12/1" I have not checked if this is a repeatable bug but will update the post if/when I go back to that level.

That one is already fixed in v 1.0.0.1.1

Didn't notice there was an update! Thank you.

It's at the moment only available in GOG Galaxy because it was released in the evening on Friday when GOG already called it a day. Offline installers should be available on Monday or so I guess.