I think your game looks and sounds great, it's a real blast of nostalgia to when I used to play a lot of these black and white games, I think you hit that aesthetic spot on. One thing I've noticed is that the player, or at least that's what it felt like for me, is a bit lost and doesn't know what to do or what goal he is trying to work towards so it's easy to loose motivation and click away. I'm not saying you should put a big text box intro in front of it, but just something subtle to hook the player, to give him a purpose.
Otherwise I think you did a great job, the game fits the theme very well and it looks fantastic,
keep it up!