Gameplay
The gameplay is effectively identical to the original Lemmings game. However, while the first few levels for the Fun rating in the original game are tutorial-like, the Tame levels in ONM Lemmings are just simple levels without hints on how to complete them.
All subsequent levels are considerably more difficult than those from the original game and become tougher at a much greater rate. Some players consider the Oh No! levels to be more entertaining, as they present a much greater challenge than those of the first game. The quota for the skills on many levels is set so that you need to use them all up, thus giving only one possible way to complete many levels in ONML.
Read more about this topic: Oh No! More Lemmings