For some reason I'm following you and I don't know why.
Anyhow, I tested your game and I it looks good. Sad that you didn't manage to put all your ideas into it.
I found a little bug, when you shoot off the island. The bullet flies forever and the game is hard-locked. So, maybe put some trigger area in the water which will destroy the bullet ;)
Keep in mind that you play as dumb as possible when testing your games.
One last thing. I really like the destruction effect on the ground. Do you have a tutorial for that? Because I'm really interested in this effect.