This is so funny, i love it!
My ideas for improvement, although it's very good experience as it is :
- ads move and open a new tab when you misclick on close button
- may be you need to go through a few links to find the button, and there are troubles with biscuits on each jump
- at the end of the game i kind of remembered where the button is for each site type, i guess you could place it between random paragraphs