I really wish there were more than just skeletons with different behaviors. Since I couldn't do anything the whole time, it would have added some variety. Either that, or a shorter trip to the necro. I experimented a few rounds to figure out the mechanics and once I figured them out, it was fun the first round, but the idea of trekking through that whole gauntlet again (in order to reach the boss) without hope of speeding it up didn't feel appealing to me.
That said, it was a really "cute" and entertaining game the first round :)