That was fun, I made it to wave 6 with some practice. I agree with others here that the biggest challenge I had was finding the enemies or getting to them in time. Nothing wrong with that but I think the game would benefit from a non-linear level in that case so I could optimize my route. Or you could give indicators of where the next wave of enemies is with a map or arrows on screen or something.
I love mythology and folklore so that as the theme was really cool. I really liked the little touches like the parallax scrolling background and the music speeding up when you're running out of time. I especially liked the character and enemy art, they were simple but evocative. And the death animations for enemies felt really good.