That's some really great stuff, thanks for sharing. I really enjoy monochromatic works, especially with black and white. The sketchy feel is pretty nice to look at!
Also for expanding the window, if your project is set to embed in the page (it looks like it is) then you manually set the size to whatever you want. I have it set to 900 x 600 for my stuff because I like seeing the borders around my window, but you can set it to whatever you want really. These options are in the "Edit game" tab, right under the upload. That's how you change it for any embedded games :D