Oh, hello! I've been watching your YouTube channel for a long time, So glad to see your comment here.
I’ve always wanted to make the game closer to the original atmosphere. Thank you for the suggestion!
You can enter the Konami Code(↑ ↑ ↓ ↓ ← → ← → B A ) any time before the scene loads. If successful, you'll hear an extra life sound effect. However, be careful: if the last two digits of the cheat code are entered in reverse order,you'll hear a death sound effect insted, and the game will enter an easter egg mode.