diff --git a/distancefieldfonts/distancefieldfonts.cpp b/distancefieldfonts/distancefieldfonts.cpp
index a003c09a..fdf2cbc6 100644
--- a/distancefieldfonts/distancefieldfonts.cpp
+++ b/distancefieldfonts/distancefieldfonts.cpp
@@ -113,8 +113,8 @@ public:
 
 	VulkanExample() : VulkanExampleBase(ENABLE_VALIDATION)
 	{
-		zoom = -1.5f;
-		rotation = { 0.0f, 0.0f, 0.0f };
+		zoom = -2.0f;
+		enableTextOverlay = true;
 		title = "Vulkan Example - Distance field fonts";
 	}
 
@@ -240,30 +240,18 @@ public:
 		renderPassBeginInfo.clearValueCount = 2;
 		renderPassBeginInfo.pClearValues = clearValues;
 
-		VkResult err;
-
 		for (int32_t i = 0; i < drawCmdBuffers.size(); ++i)
 		{
-			// Set target frame buffer
 			renderPassBeginInfo.framebuffer = frameBuffers[i];
 
-			err = vkBeginCommandBuffer(drawCmdBuffers[i], &cmdBufInfo);
-			assert(!err);
+			VK_CHECK_RESULT(vkBeginCommandBuffer(drawCmdBuffers[i], &cmdBufInfo));
 
 			vkCmdBeginRenderPass(drawCmdBuffers[i], &renderPassBeginInfo, VK_SUBPASS_CONTENTS_INLINE);
 
-			VkViewport viewport = vkTools::initializers::viewport(
-				(float)width,
-				(splitScreen) ? (float)height / 2.0f : (float)height,
-				0.0f,
-				1.0f);
+			VkViewport viewport = vkTools::initializers::viewport((float)width, (splitScreen) ? (float)height / 2.0f : (float)height, 0.0f, 1.0f);
 			vkCmdSetViewport(drawCmdBuffers[i], 0, 1, &viewport);
 
-			VkRect2D scissor = vkTools::initializers::rect2D(
-				width,
-				height,
-				0,
-				0);
+			VkRect2D scissor = vkTools::initializers::rect2D(width, height, 0, 0);
 			vkCmdSetScissor(drawCmdBuffers[i], 0, 1, &scissor);
 
 			VkDeviceSize offsets[1] = { 0 };
@@ -289,40 +277,10 @@ public:
 
 			vkCmdEndRenderPass(drawCmdBuffers[i]);
 
-			err = vkEndCommandBuffer(drawCmdBuffers[i]);
-			assert(!err);
+			VK_CHECK_RESULT(vkEndCommandBuffer(drawCmdBuffers[i]));
 		}
 	}
 
-	void draw()
-	{
-		VkResult err;
-
-		// Get next image in the swap chain (back/front buffer)
-		err = swapChain.acquireNextImage(semaphores.presentComplete, &currentBuffer);
-		assert(!err);
-
-		submitPostPresentBarrier(swapChain.buffers[currentBuffer].image);
-
-		// Command buffer to be sumitted to the queue
-		submitInfo.commandBufferCount = 1;
-		submitInfo.pCommandBuffers = &drawCmdBuffers[currentBuffer];
-
-		// Submit to queue
-		err = vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE);
-		assert(!err);
-
-		submitPrePresentBarrier(swapChain.buffers[currentBuffer].image);
-
-		err = swapChain.queuePresent(queue, currentBuffer, semaphores.renderComplete);
-		assert(!err);
-
-		err = vkQueueWaitIdle(queue);
-		assert(!err);
-	}
-
-	// todo : function fill buffer with quads from font
-
 	// Creates a vertex buffer containing quads for the passed text
 	void generateText(std:: string text)
 	{
@@ -474,16 +432,14 @@ public:
 				setLayoutBindings.data(),
 				setLayoutBindings.size());
 
-		VkResult err = vkCreateDescriptorSetLayout(device, &descriptorLayout, nullptr, &descriptorSetLayout);
-		assert(!err);
+		VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorLayout, nullptr, &descriptorSetLayout));
 
 		VkPipelineLayoutCreateInfo pPipelineLayoutCreateInfo =
 			vkTools::initializers::pipelineLayoutCreateInfo(
 				&descriptorSetLayout,
 				1);
 
-		err = vkCreatePipelineLayout(device, &pPipelineLayoutCreateInfo, nullptr, &pipelineLayout);
-		assert(!err);
+		VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pPipelineLayoutCreateInfo, nullptr, &pipelineLayout));
 	}
 
 	void setupDescriptorSet()
@@ -495,8 +451,7 @@ public:
 				1);
 
 		// Signed distance front descriptor set
-		VkResult vkRes = vkAllocateDescriptorSets(device, &allocInfo, &descriptorSets.sdf);
-		assert(!vkRes);
+		VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSets.sdf));
 
 		// Image descriptor for the color map texture
 		VkDescriptorImageInfo texDescriptor =
@@ -530,8 +485,7 @@ public:
 		vkUpdateDescriptorSets(device, writeDescriptorSets.size(), writeDescriptorSets.data(), 0, NULL);
 
 		// Default font rendering descriptor set
-		vkRes = vkAllocateDescriptorSets(device, &allocInfo, &descriptorSets.bitmap);
-		assert(!vkRes);
+		VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSets.bitmap));
 
 		// Image descriptor for the color map texture
 		texDescriptor.sampler = textures.fontBitmap.sampler;
@@ -637,14 +591,12 @@ public:
 		pipelineCreateInfo.stageCount = shaderStages.size();
 		pipelineCreateInfo.pStages = shaderStages.data();
 
-		VkResult err = vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.sdf);
-		assert(!err);
+		VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.sdf));
 
 		// Default bitmap font rendering pipeline
 		shaderStages[0] = loadShader(getAssetPath() + "shaders/distancefieldfonts/bitmap.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
 		shaderStages[1] = loadShader(getAssetPath() + "shaders/distancefieldfonts/bitmap.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
-		err = vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.bitmap);
-		assert(!err);
+		VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.bitmap));
 	}
 
 	// Prepare and initialize uniform buffer containing shader uniforms
@@ -653,8 +605,9 @@ public:
 		// Vertex shader uniform buffer block
 		createBuffer(
 			VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
+			VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
 			sizeof(uboVS),
-			&uboVS,
+			nullptr,
 			&uniformData.vs.buffer,
 			&uniformData.vs.memory,
 			&uniformData.vs.descriptor);
@@ -663,8 +616,9 @@ public:
 		// Contains font rendering parameters
 		createBuffer(
 			VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
+			VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
 			sizeof(uboFS),
-			&uboFS,
+			nullptr,
 			&uniformData.fs.buffer,
 			&uniformData.fs.memory,
 			&uniformData.fs.descriptor);
@@ -677,18 +631,17 @@ public:
 	{
 		// Vertex shader
 		glm::mat4 viewMatrix = glm::mat4();
-		uboVS.projection = glm::perspective(glm::radians(splitScreen ? 45.0f : 45.0f), (float)width / (float)(height * ((splitScreen) ? 0.5f : 1.0f)), 0.001f, 256.0f);
+		uboVS.projection = glm::perspective(glm::radians(splitScreen ? 30.0f : 45.0f), (float)width / (float)(height * ((splitScreen) ? 0.5f : 1.0f)), 0.001f, 256.0f);
 		viewMatrix = glm::translate(viewMatrix, glm::vec3(0.0f, 0.0f, splitScreen ? zoom : zoom - 2.0f));
 
 		uboVS.model = glm::mat4();
-		uboVS.model = viewMatrix * glm::translate(uboVS.model, glm::vec3(0, 0, 0));
+		uboVS.model = viewMatrix * glm::translate(uboVS.model, cameraPos);
 		uboVS.model = glm::rotate(uboVS.model, glm::radians(rotation.x), glm::vec3(1.0f, 0.0f, 0.0f));
 		uboVS.model = glm::rotate(uboVS.model, glm::radians(rotation.y), glm::vec3(0.0f, 1.0f, 0.0f));
 		uboVS.model = glm::rotate(uboVS.model, glm::radians(rotation.z), glm::vec3(0.0f, 0.0f, 1.0f));
 
 		uint8_t *pData;
-		VkResult err = vkMapMemory(device, uniformData.vs.memory, 0, sizeof(uboVS), 0, (void **)&pData);
-		assert(!err);
+		VK_CHECK_RESULT(vkMapMemory(device, uniformData.vs.memory, 0, sizeof(uboVS), 0, (void **)&pData));
 		memcpy(pData, &uboVS, sizeof(uboVS));
 		vkUnmapMemory(device, uniformData.vs.memory);
 	}
@@ -697,12 +650,25 @@ public:
 	{
 		// Fragment shader
 		uint8_t *pData;
-		VkResult err = vkMapMemory(device, uniformData.fs.memory, 0, sizeof(uboFS), 0, (void **)&pData);
-		assert(!err);
+		VK_CHECK_RESULT(vkMapMemory(device, uniformData.fs.memory, 0, sizeof(uboFS), 0, (void **)&pData));
 		memcpy(pData, &uboFS, sizeof(uboFS));
 		vkUnmapMemory(device, uniformData.fs.memory);
 	}
 
+	void draw()
+	{
+		VulkanExampleBase::prepareFrame();
+
+		// Command buffer to be sumitted to the queue
+		submitInfo.commandBufferCount = 1;
+		submitInfo.pCommandBuffers = &drawCmdBuffers[currentBuffer];
+
+		// Submit to queue
+		VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE));
+
+		VulkanExampleBase::submitFrame();
+	}
+
 	void prepare()
 	{
 		VulkanExampleBase::prepare();
@@ -746,6 +712,32 @@ public:
 		updateFontSettings();
 	}
 
+	virtual void keyPressed(uint32_t keyCode)
+	{
+		switch (keyCode)
+		{
+		case 0x53:
+		case GAMEPAD_BUTTON_X:
+			toggleSplitScreen();
+			break;
+		case 0x4F:
+		case GAMEPAD_BUTTON_A:
+			toggleFontOutline();
+			break;
+
+		}
+	}
+
+	virtual void getOverlayText(VulkanTextOverlay *textOverlay)
+	{
+#if defined(__ANDROID__)
+		textOverlay->addText("Press \"Button A\" to toggle outline", 5.0f, 85.0f, VulkanTextOverlay::alignLeft);
+		textOverlay->addText("Press \"Button A\" to toggle splitscreen", 5.0f, 100.0f, VulkanTextOverlay::alignLeft);
+#else
+		textOverlay->addText("Press \"o\" to toggle outline", 5.0f, 85.0f, VulkanTextOverlay::alignLeft);
+		textOverlay->addText("Press \"s\" to toggle splitscreen", 5.0f, 100.0f, VulkanTextOverlay::alignLeft);
+#endif
+	}
 };
 
 VulkanExample *vulkanExample;
@@ -756,18 +748,6 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 	if (vulkanExample != NULL)
 	{
 		vulkanExample->handleMessages(hWnd, uMsg, wParam, lParam);
-		if (uMsg == WM_KEYDOWN)
-		{
-			switch (wParam)
-			{
-			case 0x53:
-				vulkanExample->toggleSplitScreen();
-				break;
-			case 0x4F:
-				vulkanExample->toggleFontOutline();
-				break;
-			}
-		}
 	}
 	return (DefWindowProc(hWnd, uMsg, wParam, lParam));
 }