diff --git a/CMakeLists.txt b/CMakeLists.txt
index 973380b..34e6895 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -31,7 +31,7 @@ add_definitions(-DSHAREDIR=\"${INSTALL_DATA_DIR}\")
 endif()
 
 #Compiler options
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wno-sign-compare -std=c++11")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -std=c++11")
 set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_DEBUG} -g")
 set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_RELEASE} -O2")
 
diff --git a/source/code/MenuSystem.cpp b/source/code/MenuSystem.cpp
index ca4761e..7f84287 100644
--- a/source/code/MenuSystem.cpp
+++ b/source/code/MenuSystem.cpp
@@ -227,19 +227,19 @@ void Menu::run() {
 
 				if (event.key.keysym.sym == SDLK_DOWN) {
 					marked++;
-					if (marked>buttons.size()) {
+					if (marked> (int)buttons.size()) {
 						marked = 0;
 					}
 				}
 
 				if (event.key.keysym.sym == SDLK_RETURN || event.key.keysym.sym == SDLK_KP_ENTER ) {
-					if (marked < buttons.size()) {
+					if (marked < (int)buttons.size()) {
 						buttons.at(marked)->doAction();
 						if (buttons.at(marked)->isPopOnRun()) {
 							running = false;
 						}
 					}
-					if (marked == buttons.size()) {
+					if (marked == (int)buttons.size()) {
 						running = false;
 					}
 				}
@@ -248,10 +248,10 @@ void Menu::run() {
 
 		}
 
-		for (int i=0; i<buttons.size(); i++) {
+		for (int i=0; i<(int)buttons.size(); i++) {
 			buttons.at(i)->marked = (i == marked);
 		}
-		exit.marked = (marked == buttons.size());
+		exit.marked = (marked == (int)buttons.size());
 		Uint8 buttonState = SDL_GetMouseState(&mousex,&mousey);
 		// If the mouse button is released, make bMouseUp equal true
 		if ( (buttonState&SDL_BUTTON(1))==0) {
@@ -259,7 +259,7 @@ void Menu::run() {
 		}
 
 		if (abs(mousex-oldmousex)>5 || abs(mousey-oldmousey)>5) {
-			for (int i=0; i< buttons.size(); ++i) {
+			for (int i=0; i< (int)buttons.size(); ++i) {
 				if (buttons.at(i)->isClicked(mousex,mousey)) {
 					marked = i;
 				}
@@ -274,7 +274,7 @@ void Menu::run() {
 		//mouse clicked
 		if ( (buttonState&SDL_BUTTON(1) )==SDL_BUTTON(1) && bMouseUp) {
 			bMouseUp = false;
-			for (int i=0; i< buttons.size(); ++i) {
+			for (int i=0; i< (int)buttons.size(); ++i) {
 				if (buttons.at(i)->isClicked(mousex,mousey)) {
 					buttons.at(i)->doAction();
 					if (buttons.at(i)->isPopOnRun()) {
diff --git a/source/code/ReadKeyboard.cpp b/source/code/ReadKeyboard.cpp
index e0897f9..695cec5 100644
--- a/source/code/ReadKeyboard.cpp
+++ b/source/code/ReadKeyboard.cpp
@@ -47,19 +47,13 @@ ReadKeyboard::ReadKeyboard(const char* oldName) {
 
 
 void ReadKeyboard::putchar(const std::string& thing) {
-	/*for (char a : thing) {
-	    std::cout << (int)a;
-	}
-	std::cout << std::endl;
-	cout << "Length (pre): " << std::distance(text_string.begin(), position) << endl;*/
-	if (text_string.length() < maxLength) {
+	if ( (int)text_string.length() < maxLength) {
 		int oldPostition = utf8::distance(text_string.begin(), position);
 		int lengthOfInsertString = utf8::distance(thing.begin(), thing.end());
 		text_string.insert(position, thing.begin(), thing.end());
 		position = text_string.begin();  //Inserting may destroy our old iterator
 		utf8::advance(position, oldPostition + lengthOfInsertString, text_string.end());
 	}
-	//cout << "Length (post): " << std::distance(text_string.begin(), position) << endl;
 }
 
 
@@ -82,10 +76,6 @@ bool ReadKeyboard::ReadKey(const SDL_Event& key) {
 }
 
 bool ReadKeyboard::ReadKey(SDL_Keycode keyPressed) {
-	/*if (keyPressed == SDLK_SPACE) {
-	    ReadKeyboard::putchar(' ');
-	    return true;
-	}*/
 	if (keyPressed == SDLK_DELETE) {
 		if ((text_string.length()>0)&& (position<text_string.end())) {
 			ReadKeyboard::removeChar();
diff --git a/source/code/listFiles.cpp b/source/code/listFiles.cpp
index 26b464a..54ad367 100644
--- a/source/code/listFiles.cpp
+++ b/source/code/listFiles.cpp
@@ -76,7 +76,7 @@ void ListFiles::setDirectory(const string& directory) {
 }
 
 bool ListFiles::isInList(const string& name) {
-	for (int i=0; i< filenames.size(); i++) {
+	for (int i=0; i< (int)filenames.size(); i++) {
 		if (name == filenames.at(i) ) {
 			return true;
 		}
@@ -106,7 +106,7 @@ void ListFiles::setDirectory2(const string& dic) {
 }
 
 string ListFiles::getFileName(int nr) {
-	if (startFileNr+nr<filenames.size()) {
+	if (startFileNr+nr< (int)filenames.size()) {
 		return filenames[startFileNr+nr];
 	}
 	else {
@@ -116,7 +116,7 @@ string ListFiles::getFileName(int nr) {
 
 bool ListFiles::fileExists(int nr) {
 	string emptyString="";
-	if (startFileNr+nr<filenames.size()) {
+	if (startFileNr+nr<(int)filenames.size()) {
 		if (filenames[startFileNr+nr]==emptyString) {
 			return false;
 		}
@@ -139,7 +139,7 @@ void ListFiles::back() {
 }
 
 void ListFiles::forward() {
-	if (startFileNr<filenames.size()-FIRST_FILE) {
+	if (startFileNr<(int)filenames.size()-FIRST_FILE) {
 		startFileNr = startFileNr+10;
 	}
 }
diff --git a/source/code/stageclearhandler.cpp b/source/code/stageclearhandler.cpp
index ef81f6e..477d7d2 100644
--- a/source/code/stageclearhandler.cpp
+++ b/source/code/stageclearhandler.cpp
@@ -32,10 +32,10 @@ std::string stageClearSavePath;
 
 
 std::vector<bool> stageCleared(nrOfStageLevels);		//vector that tells if a stage is cleared
-std::vector<Uint32> stageTimes(nrOfStageLevels);             //For statistical puposes
-std::vector<Uint32> stageScores(nrOfStageLevels);            //--||--
-Uint32 totalScore = 0;
-Uint32 totalTime = 0;
+std::vector<Sint32> stageTimes(nrOfStageLevels);             //For statistical puposes
+std::vector<Sint32> stageScores(nrOfStageLevels);            //--||--
+Sint32 totalScore = 0;
+Sint32 totalTime = 0;
 
 using namespace std;