It's a quick read. Found it myself and figured I should point it out - I think a lot of people used to steam would expect a link to the manual in either the game store page or the right click menu in impulse. Shortest way is to right click elemental in the 'my games' tab and select 'open application folder', it's right there.
Anyway, I did learn a new thing or two, and the keyboard short cut list is useful,
