First, I loved how the art and soundtrack fits the theme and the idea of the game is so creative and unique makes me want to check out other game you guys developed.
The only issues that I saw is the characters and enemy's getting stuck probably because of collision. I don't why it doesn't let me repair the doors.
But I love the idea of the game of that your limitation is you only have the witch and the one minion to fend of the zombies while waiting for minion 2 to finish the potion. If you decide to continue this game, my suggestion is to add rounds and every time it gets more difficult. Goodluck <3