diff --git a/src/Game.h b/src/Game.h
index 15fe7de..a16bab3 100644
--- a/src/Game.h
+++ b/src/Game.h
@@ -6,8 +6,8 @@
 
 #define WIDTH 1000
 #define HEIGHT 500
-#define GROUND_Y 400
-#define SPEC_Y 150
+#define GROUND_Y (HEIGHT * 0.8)
+#define SPEC_Y (HEIGHT * 0.3)
 
 class Window;
 class Game {
diff --git a/src/Window.cpp b/src/Window.cpp
index f87a718..e8cfc15 100644
--- a/src/Window.cpp
+++ b/src/Window.cpp
@@ -19,8 +19,8 @@ void Window::paintEvent(QPaintEvent *event) {
 	game.draw(output);
 	label->setPixmap(output.scaled(label->size()));
 	update();
-	auto now = std::chrono::high_resolution_clock::now();
-	auto diff = duration_cast<std::chrono::nanoseconds>((now - tp));
+	auto now = high_resolution_clock::now();
+	auto diff = duration_cast<nanoseconds>((now - tp));
 	double seconds = double(diff.count()) / 1000. / 1000. / 1000. ;
 	currentFPS = 1 / seconds;
 	tp = now;