I think the disk space requirement needs to be updated. It says 16MB, but NeoLemmix + the styles
compressed is nearly 30MB. That's not taking into account some levels to play, which due to being text-based now, take up a lot more space when uncompressed.
On page 5, you mention "a pack may contain up to 15 different ranks". With new-formats, this limit no longer exists, a pack may have any number of ranks.
On page 9, the wording "rough sketch" is somewhat misleading. I'd suggest something like "zoomed-out overview" instead.
Page 10, the select level key (F2) also works from the preview screen.
Page 11, point 2, there's an incomplete sentence at the end of the paragraph.
Page 12, re replay insert mode, I'm fairly sure there's a hotkey that specifically cancels replay mode (I think C by default?). I do recall there was discussion about removing it, though. (If so, was this before replay insert mode existed? If it was, it may be worth bringing that key back.)
Also on page 12, "This does not override any permanent skills, i.e. a climber who currently bashes through some terrain will be described as CLIMBER not BASHER." I think it
does override permanents these days? (I don't currently have NL set up on my computer to check.)
Page 14, point 16. I'm fairly sure that clicking the one frame step buttons (or pressing the respective hotkey) pauses the game automatically if it isn't already paused.
Page 15, point 21. "Warning: The minimap does not display all of the level, when it spans more than one screen vertically." If the player is using the full-size panel, the minimap can handle some degree of vertical scrolling. Conversely, on a very wide level, the minimap won't show the whole
horizontal range.
Page 17, "A platformer is very similar to a builder." This seems weird considering the builder hasn't been introduced yet. Also, with the skill list in general, Fencer should come between Basher and Miner; it's the only one that deviates from the current in-game ordering in the manual.
Page 23, "If you have a save state, then you may go back to this position by hitting the Load State hotkey. It enters replay mode and replays your current attempt from there on (if you let it)." I'm fairly sure I changed the behaviour so that save state even saves your replay (and thus, load state loads the replay data from at the time you saved state).
Page 26, like on the preview screen, you can access the level select menu from the postview screen.
Page 27, "though floaters, gliders and lemmings on the verge of exploding or stoning may jump directly into the exit". I'm not sure about floaters / gliders, but ohnoers can no longer exit unless they have terrain below them. (They still can if they fall and land on terrain in front of an exit, all before exploding.)
Page 29, "They [one-way walls] come in three kinds: Left-facing, right-facing and down-facing one-way-walls." Four kinds now. The detailed list does mention one-way up; it's just the wording before it that doesn't. That aside, "all other skills work normally" in the detailed list implies that Fencers can destroy left/right walls in any direction.
Page 32, "If you are too lazy to search for a certain key in the key list"... this wording feels a bit harsh.

Page 33, graphics options, the zoom-related stuff seems to be based off back when NeoLemmix worked on a fixed 320x200 (or integer multiple thereof) screen size, rather than the newer setup that allows arbitrary window / screen sizes and utilizes as much space as it can.
Overall though, looks good!
