Oh shit, 30 second blocks....this spells death for this coin, it will be attacked so hard one day. And SHA-3 isn't necessarily safer than SHA-2, since it's new who knows what holes it might have.
Also - CPU coin = botnets....
It uses all of the crypto functions that were SHA-3 finalists: Blake, BMW, Groest, JH, Keccak, and Skein.