Liked the twist on both tower defense and the theme, it's a cool idea to make the person, not the contestant but instead the evil host.
The placing buttons felt a little unresponsive and I believe the far-right ground one was broken as I couldn't get it to work but that might just be user error, one thing that I suggest adding is the ability for the player to speed up time just because once I put down all my towers it's kinda tedious to wait 45 more seconds but those are hard to add I'm sure so I understand why you didn't have one. Besides that great job :)