Can I set the card flippers to flip when clicked instead of on hover?

You sure can! The current version of the CLEAN theme has it built right in.

All you need to do in order to turn this feature on is to click the module while in the HubSpot CMS in order to bring up the edit mode.  Then click /// Card Settings. Scroll down a bit and you'll see the option.

Screen Shot 2021-03-01 at 12.24.58 PM

Easy, right?