Cursed Treasure very fun, but balancing issues
finished the game with brilliant on every level except for the last one, where i got excellent.
overall, a very fun TD game, but has problems with some towers/enemies being too powerful compared to others.
as many people mentioned, chilling crypt is the best tower there is, especially since they can scare even the champions, but other towers have their uses, so that's not that big of a problem.
now, for the ninja. that's a bigger problem. at level 35 with almost all skills full except scorching gem, return gem (they are pointless as I was trying to get brillant on all levels) and that orcish den upgrade, ninjas still sneak past into my weaker, lower leveled towers. and this is with hellfire tower and ballista/catapult dealing massive splash damage on entry. and don't even get me started on hard level boss ninjas, as nobody can stop them from touching the gem except with full meteor cost/damage upgrades and maximum mana capacity. invisibillity really needs to be toned down.