Your game hs nice movement and basic, but still fun shoting mechanics. You are obviousely a programmer and not a artist, because the map is literally the overview map of the Western Dessert Town marketplace asset, wich was a free for the mont asset not to long ago. The minions are just some assets too. BUT just because the visuals are not as good, it doesent mean this isn't a decent game. The mechanics are good. I will just assume, that you are using the nav-mesh system. You should adjust the nav mesh bounds volume. You should add nav-links to some areas of the game. I suggest you change the setting from western/sci-fi to only western or only sci-fi (or anything else) and play around with the navigation.
Even though the game has its flaws, it still remain fun and entertaining for some time.