I suggest you read this post- https://itch.io/blog/800154/secret-user-guide
at the bottom of the post are the reasons for the appearance of hitmen and their chance values. Hiding under the bed is a solution for the hitman to leave you alone. unless your character value is low (red). if you are thirsty you will cough, if you are hungry your stomach will growl, if you are mentally unstable you will gasp. this will make the hitman hear you.
I will add one more character for the free version before the final version is released.