Sorry for being lame, but I don't have access to my Atari just yet this morning, so I figured I'd share a few quick suggestions on the manual.
On the "How to play" page:
"Some enemies take multiple hits, or even special items, to destroy them". I think you can safely remove all commas in this sentence.
On the "Secrets" page
"Defeating all the enemies in a room may uncover hidden items, or open hidden doors". You can safely remove that comma.
On the "Switches" page,
1) "Be warned, by flipping" - Change that comma to a semicolon
2) The third graphic looks really zoomed out compared to the first two. It makes it hard to see the door that's obvious in the second screenshot. Maybe replace it with a screesnhot that is at the same zoom level as the other ones?
3) The second row of text for the switch picture text sort of bleeds into the manual underneath. Not sure if you can add another blank line after the last "this door open" for readability. It looks like there may additional space above the switch pictures that you can borrow from, if needed.
On the "About Anguna" page:
"and completed it in 2008, with the help of Chris". You can safely remove that comma
Need a period at the end of the second paragraph.
Sorry to be nit-picky, but I figured these may be helpful. It looks great! Can't wait to try it.