diff --git a/addons/libLibRetroHost-d.so b/addons/libLibRetroHost-d.so
index 75e7f5c..cf226e8 100755
Binary files a/addons/libLibRetroHost-d.so and b/addons/libLibRetroHost-d.so differ
diff --git a/build_gdlibretro.sh b/build_gdlibretro.sh
index 91a6499..7891b5a 100755
--- a/build_gdlibretro.sh
+++ b/build_gdlibretro.sh
@@ -2,8 +2,9 @@
 
 git clone https://github.com/gabrielmedici/gdlibretro
 cd gdlibretro
-git submodule update --init --recursive
-cmake -DNO_GIT_REVISION=ON -DCMAKE_BUILD_TYPE=Debug -DLINUX=true -DCMAKE_CXX_FLAGS="-DLINUX" .
-cmake --build .
-cd -
-mv -fv "gdlibretro/LibRetroHost/lib/Linux-x86_64/libLibRetroHost-d.so" "addons"
+git submodule update --init --recursive && \
+cmake -DNO_GIT_REVISION=ON -DCMAKE_BUILD_TYPE=Debug -DLINUX=true -DCMAKE_CXX_FLAGS="-DLINUX" . && \
+cmake --build . && \
+cd - && \
+mv -fv "gdlibretro/LibRetroHost/lib/Linux-x86_64/libLibRetroHost-d.so" "addons" && \
+rm -rf "gdlibretro/LibRetroHost"
diff --git a/main.gd b/main.gd
index 5761ffc..21b2def 100644
--- a/main.gd
+++ b/main.gd
@@ -4,8 +4,15 @@ extends Node
 
 func _ready():
 	var core_path = "res://cores/genesis_plus_gx_libretro.so"  # Replace with your actual core path
+	if not FileAccess.file_exists(core_path):
+		push_error("Core not found at: " + core_path)
+	return false
+
 	var rom_path = "res://roms/megadrive/Sonic the Hedgehog.bin"  # Replace with your actual ROM path
-	
+	if not FileAccess.file_exists(rom_path):
+		push_error("Rom not found at: " + rom_path)
+	return false
+
 	print("Core path: ", core_path)
 	print("ROM path: ", rom_path)
 
diff --git a/project.godot b/project.godot
index aaa0c5a..dc1a1c4 100644
--- a/project.godot
+++ b/project.godot
@@ -37,4 +37,6 @@ renderer/rendering_method.mobile="gl_compatibility"
 [xr]
 
 openxr/enabled=true
+openxr/foveation_level=3
+openxr/foveation_dynamic=true
 shaders/enabled=true
diff --git a/scripts/libretro_loader.gd b/scripts/libretro_loader.gd
index 82f144e..a906ade 100644
--- a/scripts/libretro_loader.gd
+++ b/scripts/libretro_loader.gd
@@ -9,8 +9,12 @@ var current_rom : String = ""  # Initialize to an empty string
 func start_emulation(core_path: String, rom_path: String) -> bool:
 	print("Starting emulation with core: ", core_path, ", ROM: ", rom_path)
 	
-	if not core_path or not rom_path:
-		push_error("Core path or ROM path is missing.")
+	if not core_path:
+		push_error("Core path is missing.")
+		return false
+	
+	if not rom_path:
+		push_error("ROM path is missing.")
 		return false
 
 	# Load the core (emulator)
@@ -47,19 +51,21 @@ func start_emulation(core_path: String, rom_path: String) -> bool:
 	current_rom = rom_path
 	print("Core and ROM loaded successfully.")
 
-	# Wait for SubViewport to render at least one frame
+	# Ensure SubViewport is ready
 	sub_viewport.render_target_update_mode = SubViewport.UPDATE_ALWAYS
-	await get_tree().create_timer(0.1).timeout  # Delay ensures rendering starts
 
-	# Assign the SubViewport texture
-	var viewport_texture = sub_viewport.get_texture()
-	if viewport_texture:
-		texture_rect.texture = viewport_texture
-		print("SubViewport texture assigned successfully.")
-	else:
-		push_error("Error: SubViewport texture is not ready.")
+	# Wait for the SubViewport to initialize (up to 3 seconds)
+	var max_wait_time = 3.0  # Maximum wait time in seconds
+	var elapsed_time = 0.0
+	while not sub_viewport.get_texture() and elapsed_time < max_wait_time:
+		await get_tree().idle_frame  # Waits for the next frame
+		elapsed_time += get_process_delta_time()
+	if not sub_viewport.get_texture():
+		push_error("Error: SubViewport texture is not ready after waiting.")
 		return false
 
+	texture_rect.texture = sub_viewport.get_texture()
+	print("SubViewport texture assigned successfully.")
 	return true
 
 func _process(delta):