way too easy. they all died too fast. Jokes aside (though we did obliterate those blocks) Fast forward button works for 1 round then disappears, You can not sell turrets, and my friend and I want way more maps. This was very fun and I highly Recommend playing with a friend. Also with our set up, the last round boss didn't really stand a chance, he just took a while to kill. If there were 2 of the higher health blocks perhaps they could have split the damage and got past our defenses. (at least for 2 people playing co-op) Otherwise fantastic game and highly recommended and look forward to future updates.