As a huge early lemmings fan who spent countless hours in the early 90s playing that game, I was not disappointed with your entry! Really flawless execution and really fun to go through all the levels! My only complaint is that I hit the R key a few times instead of the E key and ended up restarting the level when I was trying to rotate some equipment - finally figured out that I could also use the space key :)
Love the HR option :)