Yes, if you don't hit your pre-order goal, you can end your campaign. If you've already collected payments with your backers, you may need to refund those payments, however, to avoid refunds, first you need to set your Payment Capture settings to 'Manually' so that payments are not captured automatically when your backers pre-order, instead, those payments will be Authorized for a specific duration called Authorization period, beyond this period, the hold on those payments will be released, in that case it's not considered a refund.
Hitting your commits goal is a very good indicator that you're going to hit your pre-order goal, it's always a good idea to keep your commits goal a little higher than your pre-order goal.
Need help?
Send an email to support@fundlify.com