Fix issue where too few enemies were placed on the board

src/game_state/level.rs

@@ -71,7 +71,7 @@ impl Level {
 
     fn add_enemies(enemy_count: usize, board: Board) -> Board {
         let mut result = board.clone();
-        for index in 0..enemy_count - 1 {
+        for index in 0..enemy_count {
             result = Level::add_entity(Tile::Enemy(index), result);
         }
 
@@ -80,13 +80,12 @@ impl Level {
 
     fn add_entity(entity: Tile, board: Board) -> Board {
         let empty_count = Level::count_empty_tiles(board);
-        let player_position = thread_rng().gen_range(0, empty_count);
-        let player_x = player_position / config::BOARD_HEIGHT;
-        let player_y = player_position % config::BOARD_HEIGHT;
+        let entity_position = thread_rng().gen_range(0, empty_count);
+        let entity_x = entity_position / config::BOARD_HEIGHT;
+        let entity_y = entity_position % config::BOARD_HEIGHT;
 
         let mut board = board.clone();
-        board[player_x][player_y] = entity;
-
+        board[entity_x][entity_y] = entity;
         board
     }
 

src/game_state/tile.rs

-#[derive(Copy, Clone)]
+#[derive(Debug, Copy, Clone)]
 pub enum Tile {
     Enemy(usize),
     Exit,