It didn't feel as much like a game as it did a tech demo, I had fun with the levels but was completely lost on the synthesizer at the end...
I fear my brain might be too small for this game.
The synthesizer at the end is just a bonus. As soon as you get to the song, the game is over. You can compose some music on the tracker if you wish, I implemented it because I always wanted to write one + I made it so I could make the song.