Neat! I love a good falldown game and this is no exception. Wrapping the game horizontally is a neat twist too. Good sound effects (though a bit loud) and the black and white presentation is great. You should also try to unify the controls between the menu and the game, as switching back and forth from mouse to keyboard is slow.
It also seems like you haven't given much thought to this here itch.io page. We have some page templates that might interest you, and in fact a little bit of modification on our FutureGrid template to make it black and white would look awesome here! http://lantanagames.itch.io/design