Form does not appear correctly on all resolutions

I used HappyForms to create a simple feedback form, with options of

very good, good, ok, poor and very poor

I also added a text field and another to add an email address. When I click on the floating contact button widget, the feedback form displays ok on a large monitor but on a laptop screen the bottom of the form is not visible and cannot easily be interacted with and it’s not possible to resize it or drag it further up so it can be visible. Shame, as this would have been perfect for my needs.

Screen resolution on the laptop is 1366 x 768