diff --git a/src/main.cpp b/src/main.cpp
index baf2de2..7d96633 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,5 +1,7 @@
+#include <cstdint>
 #include <tonc.h>
-#include <stdint.h>
+
+#include "debug.hpp"
 
 extern "C" {
 #include "boxed_dot.h"
@@ -16,6 +18,8 @@ const struct {
 } boxed_dot;
 
 int main(void) {
+	debug::open();
+
 	// Mode 3-5 are bitmap modes.
 	// 	3: 240x160 @ 16bpp N page-flip
 	// 	4: 240x160 @ 8bpp  Y page-flip
@@ -24,6 +28,8 @@ int main(void) {
 	// BG2 is the only available background in bitmap modes.
 	REG_DISPCNT = DCNT_MODE3 | DCNT_BG2;
 
+	debug::puts("Hello World!");
+
 	// Write gradient from black -> RGB in first three lines.
 	// Each color is displayed on a separate line.
 	// for (size_t i = 0; i < 32; ++i) {
@@ -45,5 +51,7 @@ int main(void) {
 		vid_vsync();
 	}
 
+	debug::close();
+
 	return 0;
 }