A neat pair of fangames by auvenom, created about a year ago.
Lemmings Returns:
http://www.newgrounds.com/portal/view/577897Oh No More Lemmings Returns:
http://www.newgrounds.com/portal/view/579063The twist: Your 8 skills are replaced by MS Paint-style draw and erase, which you use to scribble a path to the exit. In Lemmings Returns, you get unlimited use of the brush and eraser - sounds easy, but it's far from it! In Oh No you can only draw and erase in straight lines, and you get a limited number of lines.
There's just one downside though - no Fast Forward
. Apparently it was tried but it didn't work.
Thanks to möbius for posting a link to the video on IRC, it seems no one else spotted this until now.