Very nice tower defense. I replay several times just to see the different maps.
I managed to survive the first few waves using strategy and thinking where to best use my resources. But once I've reach wave 10 apox, things just goes too easy. I have much more money than I can spend. I managed to reach wave 55, and quit cause it was just boring, The enemy spawning castle was overwhelm by my troop. No one survive more than just a few steps.
Well use of the theme.
If you continue with the project, I suggest you increase the difficult to have fun for longer. I mean.. tower defense... more addicted than that, impossible! But if the difficult keep rising.
Great work!