Hi @juiceex
You can use an fields option to show certain fields. It should be like this:
'fields' => array('field_1234567890', 'field_0987654321'),
This page should give you more idea about it: http://www.advancedcustomfields.com/resources/acf_form/.
If you want to make the form manually, please take a look at the source code to learn how ACF works.
I hope this helps.
