Welcome to MaGMML2-net!
Make a Good Mega Man Level 2 is a collection of 81 community-created Mega Man levels submitted to theMake a Good Mega Man Level 2 contest. You can find a more detailed description on the MaGMML wiki or on the thread hosted on Sprites Inc.
This website hosts the leaderboards for the best times on each level in MaGMML2, which you can access in-game as well. Click on any link on the left.