I developed a LevelSystem class, along with a CBrick component for use in it and an EStageCleared event that is triggered upon all the bricks being removed.

The class currently creates a 8x8 grid of entities with Transform components.

src/game/Game/LevelSystem.cpp

@@ -0,0 +1,69 @@
+//
+// Created by Adniklastrator on 2015-09-09.
+//
+
+
+#include "PrecompiledHeader.h"
+#include "Game/CBrick.h"
+#include "Game/LevelSystem.h"
+#include "Core/World.h"
+#include "Game/EStageCleared.h"
+
+void dd::Systems::LevelSystem::Initialize()
+{
+    CreateBasicLevel(tRows, tLines, tSpaceBetweenBricks, tSpaceToEdge);
+    return;
+}
+
+void dd::Systems::LevelSystem::CreateBasicLevel(int rows, int lines, int spacesBetweenBricks, int spaceToEdge)
+{
+    numberOfBricks = rows * lines;
+    for (int i = 0; i < rows; i++)
+    {
+        for (int j = 0; j < lines; j++)
+        {
+            CreateBrick(i, j, spacesBetweenBricks, spaceToEdge);
+        }
+    }
+
+    return;
+}
+
+void dd::Systems::LevelSystem::CreateBrick(int row, int line, int spacesBetweenBricks, int spaceToEdge)
+{
+    auto brick = m_World->CreateEntity();
+    std::shared_ptr<Components::Transform> transform = m_World->AddComponent<Components::Transform>(brick);
+    //std::shared_ptr<Components::Sprite> sprite = m_World->AddComponent<Components::Sprite>(brick);
+    float x = spaceToEdge + line * spacesBetweenBricks;
+    float y = spaceToEdge + line * spacesBetweenBricks;
+    transform->Position = glm::vec3(x, y, 0.f);
+    //sprite->Color = glm::vec4(1.f, 1.f, 1.f, 1.f);
+    return;
+}
+
+void dd::Systems::LevelSystem::ProcessCollision()
+{
+    // Like, go into brick component and check what it does upon collision. Maybe not done here?
+    return;
+}
+
+void dd::Systems::LevelSystem::OnEntityRemoved(EntityID entity)
+{
+    auto brick = m_World->GetComponent<Components::Brick>(entity);
+    if (brick != NULL)
+    {
+        numberOfBricks--;
+        if (numberOfBricks < 1)
+        {
+            EndLevel();
+        }
+    }
+    return;
+}
+
+void dd::Systems::LevelSystem::EndLevel()
+{
+    Events::StageCleared e;
+    EventBroker->Publish(e);
+    return;
+}