Nicely polished game! My first attempt was even more embarassing than the others, as I was kinda confused and started battle mode without buying anything :D
One thing, which feels counterintuitive (at least to me) is the fact that the moat doesn't seem to slow down enemies, which would've made the moat have an actually useful effect during the battle, too. Or it *does* slow them down, and I just can't notice it.