diff --git a/main.rs b/main.rs
index e83dd86..32d15af 100644
--- a/main.rs
+++ b/main.rs
@@ -81,6 +81,7 @@ fn main() {
     // vm.load_program("programs/minesweeper.as").unwrap();
     // vm.load_program("programs/2048.as").unwrap(); //bugged but same as official emulator
 
+    // TODO: fix bug in tetris
     vm.load_program("programs/tetris.as").unwrap();
 
     let window_options = WindowOptions {