"Lemmings Level" is a fan-made Amiga game, from around the time of the release of Lemmings back in the day. You can find it
here. As far as I can tell, it seems to be some sort of puzzle/platform title, in which you deal with just a single lemming.
The only trouble is, I have no idea what to do to get it to work properly! I've tried it with various settings (RAM, Kickstart, PAL/NTSC, etc.) on both E-UAE and UAE4All (I use Linux on x86 and ARM), but it does nothing. I managed to get UAE4All to show a bit of the first level once, though, but it took no inputs after that.
Has anyone else even played this? Is it actually worth all this trouble?

Is it even possible to run it in an emulator at all?
You have to connect a joystick to the second port and control the game with that. (I know WinUAE lets you emulate a joystick with the keyboard. I don't know about E-UAE and UAE4All, though.) Once you are able to play the game, remember that you have to press up to jump.
Brilliant, thankyou. I'll give that a go tomorrow! At the very least, UAE4All lets you map a secondary instance of "up" elsewhere, so you can get around that most horrible of crimes against platforming.
I can't play it on my WinUAE emulator... every time i start the first level, it crashes to the AmigaDOS screen! I configured everything! What should I do?