diff --git a/SQCSim2021/define.h b/SQCSim2021/define.h
index d0382a7..ca3c4f7 100644
--- a/SQCSim2021/define.h
+++ b/SQCSim2021/define.h
@@ -25,8 +25,8 @@
 
 #define BULLET_UPDATES_PER_FRAME 20
 
-#define BASE_WIDTH 640
-#define BASE_HEIGHT 480
+#define BASE_WIDTH 1280
+#define BASE_HEIGHT 720
 
 
 #define ANIME_PATH_JUMP		"./media/textures/AssetOtherPlayer/FinalPNGJumping/"
@@ -58,7 +58,7 @@ enum Resolution {
 	HD = 0,		// 1280x720	 (High Definition)
 	FHD,		// 1920x1080 (Full HD)
 	QHD,		// 2560x1440 (Quad HD)
-	UHD			// 3840x2160 (Ultra HD)
+	UHD,		// 3840x2160 (Ultra HD)
 };
 
 #endif // DEFINE_H__
diff --git a/SQCSim2021/engine.cpp b/SQCSim2021/engine.cpp
index c91555d..3b1e55e 100644
--- a/SQCSim2021/engine.cpp
+++ b/SQCSim2021/engine.cpp
@@ -2351,21 +2351,23 @@ void Engine::MousePressEvent(const MOUSE_BUTTON& button, int x, int y) {
 		float topChkUHD = centerY + Height() * 0.025f;
 		float bottomChkUHD = centerY;
 
-		if (m_selectedOption == 1 && x > leftChk && x < rightChk && y > bottomChkHD && y < topChkHD) {
-			m_audio.playSound(AUDIO_PATH "snap.wav", m_sfxvolume);
-			m_resolution = HD;
-		}
-		else if (m_selectedOption == 1 && x > leftChk && x < rightChk && y > bottomChkFHD && y < topChkFHD) {
-			m_audio.playSound(AUDIO_PATH "snap.wav", m_sfxvolume);
-			m_resolution = FHD;
-		}
-		else if (m_selectedOption == 1 && x > leftChk && x < rightChk && y > bottomChkQHD && y < topChkQHD) {
-			m_audio.playSound(AUDIO_PATH "snap.wav", m_sfxvolume);
-			m_resolution = QHD;
-		}
-		else if (m_selectedOption == 1 && x > leftChk && x < rightChk && y > bottomChkUHD && y < topChkUHD) {
-			m_audio.playSound(AUDIO_PATH "snap.wav", m_sfxvolume);
-			m_resolution = UHD;
+		if (m_selectedOption == 1) {
+			if (x > leftChk && x < rightChk && y > bottomChkHD && y < topChkHD) {
+				m_audio.playSound(AUDIO_PATH "snap.wav", m_sfxvolume);
+				ChangeResolution(HD);
+			}
+			else if (x > leftChk && x < rightChk && y > bottomChkFHD && y < topChkFHD) {
+				m_audio.playSound(AUDIO_PATH "snap.wav", m_sfxvolume);
+				ChangeResolution(FHD);
+			}
+			else if (x > leftChk && x < rightChk && y > bottomChkQHD && y < topChkQHD) {
+				m_audio.playSound(AUDIO_PATH "snap.wav", m_sfxvolume);
+				ChangeResolution(QHD);
+			}
+			else if (x > leftChk && x < rightChk && y > bottomChkUHD && y < topChkUHD) {
+				m_audio.playSound(AUDIO_PATH "snap.wav", m_sfxvolume);
+				ChangeResolution(UHD);
+			}
 		}
 
 		if (normalizedPosition < 0.1f) {
@@ -2503,4 +2505,29 @@ bool Engine::LoadTexture(Texture& texture, const std::string& filename, bool use
 	return true;
 }
 
+void Engine::ChangeResolution(Resolution resolution) {
+	DeInit();
+
+	switch (resolution) {
+		case HD:
+			OpenglContext::InitWindow(1280, 720);
+			m_resolution = HD;
+			break;
+		case FHD:
+			OpenglContext::InitWindow(1920, 1080);
+			m_resolution = FHD;
+			break;
+		case QHD:
+			OpenglContext::InitWindow(2560, 1440);
+			m_resolution = QHD;
+			break;
+		case UHD:
+			OpenglContext::InitWindow(3840, 2160);
+			m_resolution = UHD;
+			break;
+	}
+
+	Init();
+}
+
 
diff --git a/SQCSim2021/engine.h b/SQCSim2021/engine.h
index e743d3c..1a1303a 100644
--- a/SQCSim2021/engine.h
+++ b/SQCSim2021/engine.h
@@ -49,6 +49,7 @@ private:
     bool StartMultiplayerGame();
 
     bool LoadTexture(Texture& texture, const std::string& filename, bool useMipmaps = true, bool stopOnError = true);
+    void ChangeResolution(Resolution resolution);
 
     void InstantDamage();
     void SystemNotification(std::string systemLog);
diff --git a/SQCSim2021/openglcontext.h b/SQCSim2021/openglcontext.h
index 2718540..3bb711d 100644
--- a/SQCSim2021/openglcontext.h
+++ b/SQCSim2021/openglcontext.h
@@ -53,9 +53,9 @@ protected:
     void ShowCrossCursor() const;
 
     bool m_istarted = false;
+    void InitWindow(int width, int height);
 
 private:
-    void InitWindow(int width, int height);
     MOUSE_BUTTON ConvertMouseButton(sf::Mouse::Button button) const;
 
 private: