I've taken the advice of a friend of mine in my French class who suggested that I add the ability to save, since apparently her boyfriend had gotten angry with her over the fact she closed out Quietus when he'd gotten to level 7. Expanding on earlier mentions of a level select screen suggested by turboRamble, I proceeded to pound out a level select screen with automatic saving; if you close out the window and restart, you will still be able to play the latest level from the level select screen. Also, I've added two more levels, bringing the total count to 22. Below is a screenshot (scaled down 2x) of the level select screen.
There is also a slight controls addition: press at any point in-game and it will immediately return you to the level select screen.