Just a quick notification: I didn't have time to finish the game before the deadline!
There will be some unrefined things, and the game doesn't have an actual ending, but it's actually possible to kill all of the enemies without loosing a life, especially since the enemies are making an unplanned detour in the end :)
Quick explanation of the tower types:
Archery: fast attack , aims at one person
Mage Tower: bewitches enemies and slows them down
Stone Tower: Splash attack, but very weak
Other than that, have fun! :)