I should have made it so after you clear the first level, the start screen buttons have different text, like "Start?" or "Continue" or something.
There is a secret room in the 1st level and a secret dialogue at the end of it that involves messing around in the options menu mid dialogue.
In the 2nd level, all the secrets involve annoying god by skipping specific parts of his dialogue and there is a "secret corner" that tells you how many secrets you found