What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
When I checked your jotform http://www.jotform.me/form/42660778519466 on my browser, I can see that there was already an increase in space separation between the 2 fields on the form.
to increase the font-size of submit button, you can do it using the Form Designer.
Let us know if you need further assistance.