I made 156 maps for ElastaMania while I was still in primary school. They are in a floppy disk somewhere in my mother's place. I need to dig up that.
I have also made about 100 multiplayer levels for MineBombers as well as a new single player campaing. What makes this ever crazier is the fact that I made then in my friend's place so I don't have any copies of the left anymore.
This was still the time when I had no internet and I was the primary content creator for the games we playing with my friends if there was a level editor or modding tools available.