The Game is really fun and something i feel has alot of potential, Unfortunately it also has some problems.
I kept having a bug where enemies would just get stuck on the tile they spawned and would just march in place and then die randomly, The game also lags for some unknown reason as you get a bit further into the game which is quite frustrating as by that point you have built a kingdom you are quite attached to and want to keep expanding.
A little more variation would also be greatly appreciated, the small number of tiles means the game very quickly gets repetitive and you quickly run out of things worth spending money on, Perhaps a way to upgrade tiles to make them more efficient while also makin them more dangerous if they turn would be good? As it would give you something to spend money on later in the game when you have coins to burn.
I really really like the idea and i hope you do keeping working on it and giving it the polish it deserves