not even very interesting... why are diamonds in space? i hate having to push down the space bar the whole time.
the penguin flying one and turtle cannon were much much better too
really poor gameplay - no challenge to battles (fights are almost automatic - no variation in attack/defense) - lots of city information but it doesn't change anything int he game play - and just simple and boring. no economic model whatsover.
some good ideas, but if you're going to have a pirate theme, then make it make sense - poison and freeze are TD staples but they don't go with pirates.. think of something else