Fix it up
This is a good idea and I would like to play a fully working version.
Some problems I came across were:
-Sometimes while the hero is attacking A monster will disappear for the rest of the battle without dying.
-Clicking on things during raid mode freezes the game.
-You cant place multiples of similar creature without navigating the menus repeatedly.
-Humanoid seemed to be the worst creature type yet one of the more expensive types.
Lastly in my opinion the villagers should be much weaker.
If you fix up bugs and make the interface more usable you could have a really good game on your hands. At the moment it's just average to below average.