Can you remove the billing address fields?

Yes. You can remove the Billing Address section from your Spiffy order form, to only collect Name, Email Address, and Credit Card details.

Step 1: Click "Edit" on and existing Order Form

You can navigate to the order form editor by clicking on the pencil icon on your order form dashboard.
If you are creating a new order form, complete the order form creation process and click the orange "Edit Form" button at the bottom of the page  the end of the order form creation process.

Step 2: Click on the "Settings" tab in the order form editor

In the left-hand, vertical navigation bar, click on "Settings".

Step 3: Click on "Form Type" and click on the "Slim" option

Make sure "Slim" is selected under your Form Type settings.

Step 4: Publish your order form to save the changes

Always remember to hit publish after you make any change, to save your work.