diff --git a/assets/BUILD.gn b/assets/demo/BUILD.gn
similarity index 92%
rename from assets/BUILD.gn
rename to assets/demo/BUILD.gn
index 9fccc17..b4e0115 100644
--- a/assets/BUILD.gn
+++ b/assets/demo/BUILD.gn
@@ -1,4 +1,4 @@
-copy("assets") {
+copy("demo") {
   sources = [
     "bead.png",
     "boss_explosion.mp3",
@@ -40,5 +40,5 @@ copy("assets") {
     "woom_logo_start_frames_02-03.png",
   ]
 
-  outputs = ["$root_out_dir/assets/{{source_file_part}}"]
+  outputs = ["$root_out_dir/assets/demo/{{source_file_part}}"]
 }
diff --git a/assets/Boss_ok.png b/assets/demo/Boss_ok.png
similarity index 100%
rename from assets/Boss_ok.png
rename to assets/demo/Boss_ok.png
diff --git a/assets/Boss_ok_lvl2.png b/assets/demo/Boss_ok_lvl2.png
similarity index 100%
rename from assets/Boss_ok_lvl2.png
rename to assets/demo/Boss_ok_lvl2.png
diff --git a/assets/Boss_ok_lvl3.png b/assets/demo/Boss_ok_lvl3.png
similarity index 100%
rename from assets/Boss_ok_lvl3.png
rename to assets/demo/Boss_ok_lvl3.png
diff --git a/assets/Game_2_Boss.mp3 b/assets/demo/Game_2_Boss.mp3
similarity index 100%
rename from assets/Game_2_Boss.mp3
rename to assets/demo/Game_2_Boss.mp3
diff --git a/assets/Game_2_Main.mp3 b/assets/demo/Game_2_Main.mp3
similarity index 100%
rename from assets/Game_2_Main.mp3
rename to assets/demo/Game_2_Main.mp3
diff --git a/assets/PixelCaps!.ttf b/assets/demo/PixelCaps!.ttf
similarity index 100%
rename from assets/PixelCaps!.ttf
rename to assets/demo/PixelCaps!.ttf
diff --git a/assets/bead.png b/assets/demo/bead.png
similarity index 100%
rename from assets/bead.png
rename to assets/demo/bead.png
diff --git a/assets/boss_explosion.mp3 b/assets/demo/boss_explosion.mp3
similarity index 100%
rename from assets/boss_explosion.mp3
rename to assets/demo/boss_explosion.mp3
diff --git a/assets/boss_intro.mp3 b/assets/demo/boss_intro.mp3
similarity index 100%
rename from assets/boss_intro.mp3
rename to assets/demo/boss_intro.mp3
diff --git a/assets/chromatic_aberration.glsl_fragment b/assets/demo/chromatic_aberration.glsl_fragment
similarity index 100%
rename from assets/chromatic_aberration.glsl_fragment
rename to assets/demo/chromatic_aberration.glsl_fragment
diff --git a/assets/chromatic_aberration.glsl_vertex b/assets/demo/chromatic_aberration.glsl_vertex
similarity index 100%
rename from assets/chromatic_aberration.glsl_vertex
rename to assets/demo/chromatic_aberration.glsl_vertex
diff --git a/assets/enemy_anims_01_frames_ok.png b/assets/demo/enemy_anims_01_frames_ok.png
similarity index 100%
rename from assets/enemy_anims_01_frames_ok.png
rename to assets/demo/enemy_anims_01_frames_ok.png
diff --git a/assets/enemy_anims_02_frames_ok.png b/assets/demo/enemy_anims_02_frames_ok.png
similarity index 100%
rename from assets/enemy_anims_02_frames_ok.png
rename to assets/demo/enemy_anims_02_frames_ok.png
diff --git a/assets/enemy_anims_blast_ok.png b/assets/demo/enemy_anims_blast_ok.png
similarity index 100%
rename from assets/enemy_anims_blast_ok.png
rename to assets/demo/enemy_anims_blast_ok.png
diff --git a/assets/enemy_anims_flare_ok.png b/assets/demo/enemy_anims_flare_ok.png
similarity index 100%
rename from assets/enemy_anims_flare_ok.png
rename to assets/demo/enemy_anims_flare_ok.png
diff --git a/assets/enemy_ray_ok.png b/assets/demo/enemy_ray_ok.png
similarity index 100%
rename from assets/enemy_ray_ok.png
rename to assets/demo/enemy_ray_ok.png
diff --git a/assets/enemy_target_single_ok.png b/assets/demo/enemy_target_single_ok.png
similarity index 100%
rename from assets/enemy_target_single_ok.png
rename to assets/demo/enemy_target_single_ok.png
diff --git a/assets/explosion.mp3 b/assets/demo/explosion.mp3
similarity index 100%
rename from assets/explosion.mp3
rename to assets/demo/explosion.mp3
diff --git a/assets/hit.mp3 b/assets/demo/hit.mp3
similarity index 100%
rename from assets/hit.mp3
rename to assets/demo/hit.mp3
diff --git a/assets/laser.mp3 b/assets/demo/laser.mp3
similarity index 100%
rename from assets/laser.mp3
rename to assets/demo/laser.mp3
diff --git a/assets/menu_click.mp3 b/assets/demo/menu_click.mp3
similarity index 100%
rename from assets/menu_click.mp3
rename to assets/demo/menu_click.mp3
diff --git a/assets/menu_icons.png b/assets/demo/menu_icons.png
similarity index 100%
rename from assets/menu_icons.png
rename to assets/demo/menu_icons.png
diff --git a/assets/no_nuke.mp3 b/assets/demo/no_nuke.mp3
similarity index 100%
rename from assets/no_nuke.mp3
rename to assets/demo/no_nuke.mp3
diff --git a/assets/nuke.mp3 b/assets/demo/nuke.mp3
similarity index 100%
rename from assets/nuke.mp3
rename to assets/demo/nuke.mp3
diff --git a/assets/nuke_frames.png b/assets/demo/nuke_frames.png
similarity index 100%
rename from assets/nuke_frames.png
rename to assets/demo/nuke_frames.png
diff --git a/assets/nuke_pack_OK.png b/assets/demo/nuke_pack_OK.png
similarity index 100%
rename from assets/nuke_pack_OK.png
rename to assets/demo/nuke_pack_OK.png
diff --git a/assets/powerup-pick.mp3 b/assets/demo/powerup-pick.mp3
similarity index 100%
rename from assets/powerup-pick.mp3
rename to assets/demo/powerup-pick.mp3
diff --git a/assets/powerup-spawn.mp3 b/assets/demo/powerup-spawn.mp3
similarity index 100%
rename from assets/powerup-spawn.mp3
rename to assets/demo/powerup-spawn.mp3
diff --git a/assets/renderer_logo.png b/assets/demo/renderer_logo.png
similarity index 100%
rename from assets/renderer_logo.png
rename to assets/demo/renderer_logo.png
diff --git a/assets/shield.mp3 b/assets/demo/shield.mp3
similarity index 100%
rename from assets/shield.mp3
rename to assets/demo/shield.mp3
diff --git a/assets/sky.glsl_fragment b/assets/demo/sky.glsl_fragment
similarity index 100%
rename from assets/sky.glsl_fragment
rename to assets/demo/sky.glsl_fragment
diff --git a/assets/sky.glsl_vertex b/assets/demo/sky.glsl_vertex
similarity index 100%
rename from assets/sky.glsl_vertex
rename to assets/demo/sky.glsl_vertex
diff --git a/assets/sky_without_nebula.glsl_fragment b/assets/demo/sky_without_nebula.glsl_fragment
similarity index 100%
rename from assets/sky_without_nebula.glsl_fragment
rename to assets/demo/sky_without_nebula.glsl_fragment
diff --git a/assets/sky_without_nebula.glsl_vertex b/assets/demo/sky_without_nebula.glsl_vertex
similarity index 100%
rename from assets/sky_without_nebula.glsl_vertex
rename to assets/demo/sky_without_nebula.glsl_vertex
diff --git a/assets/stealth.mp3 b/assets/demo/stealth.mp3
similarity index 100%
rename from assets/stealth.mp3
rename to assets/demo/stealth.mp3
diff --git a/assets/woom_enemy_shield.png b/assets/demo/woom_enemy_shield.png
similarity index 100%
rename from assets/woom_enemy_shield.png
rename to assets/demo/woom_enemy_shield.png
diff --git a/assets/woom_logo_start_frames_01.png b/assets/demo/woom_logo_start_frames_01.png
similarity index 100%
rename from assets/woom_logo_start_frames_01.png
rename to assets/demo/woom_logo_start_frames_01.png
diff --git a/assets/woom_logo_start_frames_02-03.png b/assets/demo/woom_logo_start_frames_02-03.png
similarity index 100%
rename from assets/woom_logo_start_frames_02-03.png
rename to assets/demo/woom_logo_start_frames_02-03.png
diff --git a/build/android/app/build.gradle b/build/android/app/build.gradle
index 384cbe7..93e5b6d 100644
--- a/build/android/app/build.gradle
+++ b/build/android/app/build.gradle
@@ -156,7 +156,7 @@ utils.addGameTask('runNinjaFor') { String taskName, String buildType, String arc
         dependsOn "runGnFor${arch}${buildType}"
 
         executable rootProject.ext.ninja
-        args '-C', "${utils.getOutDir(buildType)}/${arch}", utils.getGnTargetFor(game)
+        args '-C', "${utils.getOutDir(buildType)}/${arch}", "src/${utils.getGnTargetFor(game)}"
 
         // Always run ninja and let it figure out what needs to be compiled.
         outputs.upToDateWhen { false }
diff --git a/src/demo/BUILD.gn b/src/demo/BUILD.gn
index 9933120..d8a7300 100644
--- a/src/demo/BUILD.gn
+++ b/src/demo/BUILD.gn
@@ -19,7 +19,7 @@ game("demo") {
     "sky_quad.h",
   ]
   deps = [
-    "//assets",
+    "//assets/demo",
     "//src/base",
     "//src/engine",
   ]
diff --git a/src/demo/demo.cc b/src/demo/demo.cc
index 4dc51e7..ce3b424 100644
--- a/src/demo/demo.cc
+++ b/src/demo/demo.cc
@@ -45,15 +45,15 @@ Demo::~Demo() {
 }
 
 bool Demo::PreInitialize() {
-  if (!font_.Load("PixelCaps!.ttf"))
+  if (!font_.Load("demo/PixelCaps!.ttf"))
     return false;
 
   Engine::Get().SetShaderSource("sky_without_nebula",
-                                "sky_without_nebula.glsl");
-  Engine::Get().SetShaderSource("sky", "sky.glsl");
+                                "demo/sky_without_nebula.glsl");
+  Engine::Get().SetShaderSource("sky", "demo/sky.glsl");
 
-  Engine::Get().AsyncLoadSound("music", "Game_2_Main.mp3", true);
-  Engine::Get().AsyncLoadSound("boss_music", "Game_2_Boss.mp3", true);
+  Engine::Get().AsyncLoadSound("music", "demo/Game_2_Main.mp3", true);
+  Engine::Get().AsyncLoadSound("boss_music", "demo/Game_2_Boss.mp3", true);
 
   if (!enemy_.PreInitialize()) {
     LOG(0) << "Failed to create the enemy.";
diff --git a/src/demo/enemy.cc b/src/demo/enemy.cc
index ed36ece..0461310 100644
--- a/src/demo/enemy.cc
+++ b/src/demo/enemy.cc
@@ -78,17 +78,20 @@ Enemy::Enemy() = default;
 Enemy::~Enemy() = default;
 
 bool Enemy::PreInitialize() {
-  Engine::Get().SetImageSource("skull_tex", "enemy_anims_01_frames_ok.png",
+  Engine::Get().SetImageSource("skull_tex", "demo/enemy_anims_01_frames_ok.png",
                                true);
-  Engine::Get().SetImageSource("bug_tex", "enemy_anims_02_frames_ok.png", true);
-  Engine::Get().SetImageSource("boss_tex1", "Boss_ok.png", true);
-  Engine::Get().SetImageSource("boss_tex2", "Boss_ok_lvl2.png", true);
-  Engine::Get().SetImageSource("boss_tex3", "Boss_ok_lvl3.png", true);
-  Engine::Get().SetImageSource("target_tex", "enemy_target_single_ok.png",
+  Engine::Get().SetImageSource("bug_tex", "demo/enemy_anims_02_frames_ok.png",
                                true);
-  Engine::Get().SetImageSource("blast_tex", "enemy_anims_blast_ok.png", true);
-  Engine::Get().SetImageSource("shield_tex", "woom_enemy_shield.png", true);
-  Engine::Get().SetImageSource("crate_tex", "nuke_pack_OK.png", true);
+  Engine::Get().SetImageSource("boss_tex1", "demo/Boss_ok.png", true);
+  Engine::Get().SetImageSource("boss_tex2", "demo/Boss_ok_lvl2.png", true);
+  Engine::Get().SetImageSource("boss_tex3", "demo/Boss_ok_lvl3.png", true);
+  Engine::Get().SetImageSource("target_tex", "demo/enemy_target_single_ok.png",
+                               true);
+  Engine::Get().SetImageSource("blast_tex", "demo/enemy_anims_blast_ok.png",
+                               true);
+  Engine::Get().SetImageSource("shield_tex", "demo/woom_enemy_shield.png",
+                               true);
+  Engine::Get().SetImageSource("crate_tex", "demo/nuke_pack_OK.png", true);
 
   for (int i = 0; i < kEnemyType_Max; ++i) {
     if (i == kEnemyType_PowerUp)
@@ -99,16 +102,16 @@ bool Enemy::PreInitialize() {
   }
 
   Engine::Get().SetShaderSource("chromatic_aberration",
-                                "chromatic_aberration.glsl");
+                                "demo/chromatic_aberration.glsl");
 
-  Engine::Get().AsyncLoadSound("boss_intro", "boss_intro.mp3");
-  Engine::Get().AsyncLoadSound("boss_explosion", "boss_explosion.mp3");
-  Engine::Get().AsyncLoadSound("explosion", "explosion.mp3");
-  Engine::Get().AsyncLoadSound("stealth", "stealth.mp3");
-  Engine::Get().AsyncLoadSound("shield", "shield.mp3");
-  Engine::Get().AsyncLoadSound("hit", "hit.mp3");
-  Engine::Get().AsyncLoadSound("powerup-spawn", "powerup-spawn.mp3");
-  Engine::Get().AsyncLoadSound("powerup-pick", "powerup-pick.mp3");
+  Engine::Get().AsyncLoadSound("boss_intro", "demo/boss_intro.mp3");
+  Engine::Get().AsyncLoadSound("boss_explosion", "demo/boss_explosion.mp3");
+  Engine::Get().AsyncLoadSound("explosion", "demo/explosion.mp3");
+  Engine::Get().AsyncLoadSound("stealth", "demo/stealth.mp3");
+  Engine::Get().AsyncLoadSound("shield", "demo/shield.mp3");
+  Engine::Get().AsyncLoadSound("hit", "demo/hit.mp3");
+  Engine::Get().AsyncLoadSound("powerup-spawn", "demo/powerup-spawn.mp3");
+  Engine::Get().AsyncLoadSound("powerup-pick", "demo/powerup-pick.mp3");
 
   return true;
 }
diff --git a/src/demo/menu.cc b/src/demo/menu.cc
index 65bb522..54d2f49 100644
--- a/src/demo/menu.cc
+++ b/src/demo/menu.cc
@@ -55,7 +55,7 @@ Menu::~Menu() = default;
 
 bool Menu::PreInitialize() {
   click_sound_ = std::make_shared<Sound>();
-  if (!click_sound_->Load("menu_click.mp3", false))
+  if (!click_sound_->Load("demo/menu_click.mp3", false))
     return false;
 
   Demo* game = static_cast<Demo*>(Engine::Get().GetGame());
@@ -72,12 +72,12 @@ bool Menu::PreInitialize() {
 
   Engine::Get().SetImageSource("menu_tex",
                                std::bind(&Menu::CreateMenuImage, this), true);
-  Engine::Get().SetImageSource("logo_tex0", "woom_logo_start_frames_01.png",
-                               true);
-  Engine::Get().SetImageSource("logo_tex1", "woom_logo_start_frames_02-03.png",
-                               true);
-  Engine::Get().SetImageSource("buttons_tex", "menu_icons.png", true);
-  Engine::Get().SetImageSource("renderer_logo", "renderer_logo.png", true);
+  Engine::Get().SetImageSource("logo_tex0",
+                               "demo/woom_logo_start_frames_01.png", true);
+  Engine::Get().SetImageSource("logo_tex1",
+                               "demo/woom_logo_start_frames_02-03.png", true);
+  Engine::Get().SetImageSource("buttons_tex", "demo/menu_icons.png", true);
+  Engine::Get().SetImageSource("renderer_logo", "demo/renderer_logo.png", true);
 
   Engine::Get().SetImageSource(
       "version_tex",
diff --git a/src/demo/player.cc b/src/demo/player.cc
index f259836..e05160d 100644
--- a/src/demo/player.cc
+++ b/src/demo/player.cc
@@ -30,14 +30,15 @@ Player::Player() = default;
 Player::~Player() = default;
 
 bool Player::PreInitialize() {
-  Engine::Get().SetImageSource("weapon_tex", "enemy_anims_flare_ok.png", true);
-  Engine::Get().SetImageSource("beam_tex", "enemy_ray_ok.png", true);
-  Engine::Get().SetImageSource("nuke_symbol_tex", "nuke_frames.png", true);
-  Engine::Get().SetImageSource("health_bead", "bead.png", true);
+  Engine::Get().SetImageSource("weapon_tex", "demo/enemy_anims_flare_ok.png",
+                               true);
+  Engine::Get().SetImageSource("beam_tex", "demo/enemy_ray_ok.png", true);
+  Engine::Get().SetImageSource("nuke_symbol_tex", "demo/nuke_frames.png", true);
+  Engine::Get().SetImageSource("health_bead", "demo/bead.png", true);
 
-  Engine::Get().AsyncLoadSound("laser", "laser.mp3");
-  Engine::Get().AsyncLoadSound("nuke", "nuke.mp3");
-  Engine::Get().AsyncLoadSound("no_nuke", "no_nuke.mp3");
+  Engine::Get().AsyncLoadSound("laser", "demo/laser.mp3");
+  Engine::Get().AsyncLoadSound("nuke", "demo/nuke.mp3");
+  Engine::Get().AsyncLoadSound("no_nuke", "demo/no_nuke.mp3");
 
   return true;
 }