The description says the ocean is full of waves...i mean that would be good if it was not only the "waves" of enemies, the ocean is just static.
I loved the music though, and the 3d models, especially the flying stuff. Good job
Overall the game is passive, i would like if we could control the tank (tell me if there's a way), when the game started i was like "why is it playing itself" then i saw the pop-ups, which are just annoying to be honest, maybe you could just put the upgrades on the screen and make them deactivated until the player can use them? That's just my idea.