Fix bug where enemy could attack on the other side of the map

src/game_state.rs

@@ -188,7 +188,8 @@ impl GameState {
     }
 
     fn check_is_neighbor(a: Point, b: Point) -> bool {
-        return GameState::check_neighbor_uint(a.0, b.0) || GameState::check_neighbor_uint(a.1, b.1);
+        GameState::check_neighbor_uint(a.0, b.0) && a.1 == b.1
+            || GameState::check_neighbor_uint(a.1, b.1) && a.0 == b.0
     }
 
     fn check_neighbor_uint(a: usize, b: usize) -> bool {