Cool quiz, some suggestions: accept 3 musketeers, typo in the Goblin Cage hint, accept Goblin Hut for Goblin Cage (as it also spawns a Goblin when killed), change Night Witch clue to "Troop that spawns bats" (as "Card" could also refer to Bats itself). And some minor points, maybe don't include the word cannon in Cannon Cart's clue (as it makes it quite obvious, maybe: "Card that becomes a building when killed"), and capitalise all the second words of cards (e.g. Night Witch)