nice game, thank you for sharing. I like the idea of defending from multiple fronts, I think that adds a nice extra layer of strategy. I also like the idea of having the chance to kill the invaders before they getaway with your gold. My feedback is that some item descriptions would have gone a long way in making the game clearer. I still do not know what the second trap is or does.
As an aside I think I encountered a bug on a later wave the moment the ships landed i lost even before the crew reached the temple.
Anyway, good job on the game!