The visuals are beautiful - The Buttons could be more intuitive, perhaps a slight animation pulse to know where exactly to click, so you can add the noose and rock traps. It only let me add one noose trap and then i couldn't seem to click and add more traps.
I think you have a good prototype here and with a bit of work on making it easier to understand as a player, what you are supposed to do and how to do it - it'll be a great game!