hey mobilems level 15 in the OhNoMoreLevels rank is the level from Genesis' Present rank(level 19-Acrophobia).
O.o, you're right. I never ever noticed this.
ok level 18-OhNoMoreLevels(Occam's Razor). I don't like this level because the exit is invisible just left of hatch. Here I thought the level was impossible. Neolemmix wouldn't like this kind of trickery, but at least in NL, one can find it anyways by hitting the physics mode icon. Had to see Icho's solution to notice that the exit was invisible left of hatch.
Haha you clearly didn't spend enough time on this level. After a couple of attempts, it should had been very obvious that you will never solve the level by using the visible exit on the very far right. There's just not enough time and there's nothing you can do to speed up the lemmings to get there faster. Also, if you're aware that Occam's razor refers to the principle that when there's multiple explanations for the same thing, the simplest one is the most likely one to be right. However, in this level it is a bit ironic in that you have to apply some logic to deduce that something else must be going on besides the visible exit you see. Then you'll see that the level title is indeed appropriate after all, because the invisible exit to the left of the entrance is even simpler than the visible one.
As for the time I encountered this level years ago, I remember just setting a blocker and seeing what happens after maybe 2 attempts using the right exit and seeing that it will never work no matter what. I kind of vaguely remember thinking, wow, what a cheap trick with the invisible exit, and also I wasn't aware of the meaning of the level title at the time, as I had never heard of it. Then again, there is also another one in a Mazulems level, but the level title at least hints it (Phantom exit) and also you have a lot of skills to mess around in the level to find it, so that one isn't too bad.
In all fairness, at least this one is very short and very easy if you know how