Tip: Bad things to do in the title demo: Enter a door or a pipe, activate a P-switch or a star, complete the level, hit a message block, or die. These will either glitch the music, or force the player into an endlessly looping title level until they reset the game.
This level is being really to make! I hope you guys like it.
BTW, in case you have lost. I posted several nice things in my hack related C3 thread, including a new level, and world 4 overworld, it's worth taking a look!