Beautiful island, good music and sound effects. I loved your UI. I would have like to see a spaceship or space port to connect your hero with the age he/ she represents. Where you maybe can pick up ammo for your gun at intervals, to make it more challenging?
Oops, I nearly forgot, you need a Pause Menu, I couldn't exit the game. I tried letting the zombies kill me, but nothing happened. Maybe a death scene and then going to the main menu where you can exit.