diff --git a/src/battle/missionInfo.h b/src/battle/missionInfo.h
index 4e9e5f1..6a2bcad 100644
--- a/src/battle/missionInfo.h
+++ b/src/battle/missionInfo.h
@@ -25,8 +25,8 @@ extern void drawText(int x, int y, int size, int align, SDL_Color c, const char
 extern void drawWidgets(char *groupName);
 extern AtlasImage *getAtlasImage(char *filename);
 extern char *getChallengeDescription(Challenge *c);
-extern char *timeToString(long millis, int showHours);
 extern void setAtlasColor(int r, int g, int b, int a);
+extern char *timeToString(long millis, int showHours);
 
 extern App app;
 extern Battle battle;
diff --git a/src/battle/starfield.c b/src/battle/starfield.c
index 7c70038..a91eb91 100644
--- a/src/battle/starfield.c
+++ b/src/battle/starfield.c
@@ -20,7 +20,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
 #include "starfield.h"
 
-Star stars[MAX_STARS];
+static Star stars[MAX_STARS];
 
 void initStars(void)
 {
diff --git a/src/game/options.c b/src/game/options.c
index d846b58..c00a709 100644
--- a/src/game/options.c
+++ b/src/game/options.c
@@ -162,6 +162,14 @@ static void changeWindowSize(char *value)
 	
 	app.uiOffset.x = (app.winWidth / 2) - (UI_WIDTH / 2);
 	app.uiOffset.y = (app.winHeight / 2) - (UI_HEIGHT / 2);
+	
+	SDL_DestroyTexture(app.backBuffer);
+	
+	app.backBuffer = SDL_CreateTexture(app.renderer, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_TARGET, app.winWidth, app.winHeight);
+	
+	initGraphics();
+	
+	initStars();
 }
 
 static void changeSoundVolume(char *value)
@@ -181,6 +189,8 @@ static void changeMusicVolume(char *value)
 static void changeFullscreen(char *value)
 {
 	app.fullscreen = strcmp(value, "On") == 0;
+	
+	SDL_SetWindowFullscreen(app.window, app.fullscreen? SDL_WINDOW_FULLSCREEN : 0);
 }
 
 static void ok(void)
diff --git a/src/game/options.h b/src/game/options.h
index 460baf8..fa969f0 100644
--- a/src/game/options.h
+++ b/src/game/options.h
@@ -30,6 +30,8 @@ extern void drawText(int x, int y, int size, int align, SDL_Color c, const char
 extern void drawWidgets(char *groupName);
 extern Widget *getWidget(const char *name, const char *group);
 extern void initControlsDisplay(void);
+extern void initGraphics(void);
+extern void initStars(void);
 extern void saveConfig(void);
 extern void selectWidget(const char *name, const char *group);
 extern void setWidgetOption(const char *name, const char *group, const char *value);