Add game over screen

game/game_state.h

@@ -6,9 +6,11 @@
 
 #include "constants.h"
 #include "sounds.h"
+#include "wave.h"
 
 typedef enum GameScreen {
     SCREEN_GAME,
+    SCREEN_GAME_OVER,
     SCREEN_PAUSE_MENU,
     SCREEN_MAIN_MENU,
     SCREEN_SETTINGS,
@@ -74,6 +76,10 @@ typedef struct Game {
 
     PlayerResources playerResources[PLAYER_COUNT];
     Player player;
+
+    WaveInfo waveInfo;
+    ecs_entity_t keepEntity;
+
     BzStackAlloc stackAlloc;
     struct {
         BzBTNode *workerHarvest;