When submitting a support request please include the version number of the ExpressionEngine and ensure that you are using the latest version of the add-on.
Support for Snaptcha can be found in this devot-ee support forum.
Do I need to add anything to my forms to make Snaptcha work?
No, all you need to do is enable the Snaptcha extension. The hidden field will automatically be added to your form and the validation done when the form is submitted. The one exception to this is member registration forms (see the Using Snaptcha section of the docs).