Added win and loss conditions along with their respective screens

game.h

@@ -5,15 +5,17 @@
 #define BOARD_HEIGHT 4
 #define STARTING_TILES 3
 
-typedef enum { UP = 0, DOWN, LEFT, RIGHT } MOVE_DIRECTION;
+typedef enum { UP, DOWN, LEFT, RIGHT } move_direction_t;
+typedef enum { PLAYING, WON, LOST } game_status_t;
 
-typedef struct{
-    int board[BOARD_HEIGHT][BOARD_WIDTH];
-    int score;
-    int moves_made;
+typedef struct {
+  int board[BOARD_HEIGHT][BOARD_WIDTH];
+  game_status_t status;
+  int score;
+  int moves_made;
 } GameState_t;
 
-
-void move(GameState_t *state, MOVE_DIRECTION direction);
+void move(GameState_t *state, move_direction_t direction);
 void reset_board(GameState_t *state);
 bool spawn_tile(GameState_t *state);
+bool can_move(GameState_t *state);