Making my TD game unique

So, I think I got the name now. Peril Pirates TD it is. What do you think?!

Also I did some major changes to the health system. I was play testing to balance things out this week when it hit me. The gold level of the treasure chest you're protecting should lower as you're being attacked! Makes sense right? The pirates are coming for your gold after all. And then this idea popped in to my head. What if your gold actually IS your life?? So you pay for defenses using your gold, but when it hits 0 you're game over. 

I think this is a cool and pretty unique idea, so I will be testing this out. Looks like imma have to do some more balancing though