Every Kickstarter project gets delayed, and as Kickstarter keeps hush about, funding a project gives you exactly zero guarantees of anything. If you expected anything less, well, I can't entirely blame you, but you should have known better.
Funding a Kickstarter project creates a legal obligation on behalf of the project creator to provide the reward for the donated amount [0], even if the project itself is ultimately unsuccessful.
Of course, should a project go so off-track that a backer is compelled to seek a refund their claim is against the creator, as Kickstarter disclaims any responsibility.
I was addressing calinet6's comment that one should expect nothing from a Kickstarter project. Sorry if my comment came across as implying you weren't fulfilling the rewards; it was meant in the generic sense. It's awesome that you're on top of things.