Kills (2,536/2,540), items (19/19), and secrets (6/6). This level ("Cinnamon Roll Massacre") was designed by me. The theme of this is you start from the center of it and go outwards, like a cinnamon roll. Saving up on ammunition and health is mandatory on this, or it's game over. Music is the Rimsala theme from Arcana. Editors used to make this are Doom Builder 2 and Slade 3 (for importing music and MAPINFO). If you are having technical difficulties with this, you can always message me or post in the comments below. I also have version 3 up (changes include unpegging top and bottom textures surrounding the windows and importing graphics, sounds, and title and intermission music into the wad file). Graphics come from sf2012-tex, cc4-tex, NB_RECOL, cc4-tex, and q1tex. Credit goes to the authors of the resources.
Cinnamon Roll Massacre: https://drive.google.com/open?id=1-mKcU06cV6nBuBeSds3UWy_u6z91arHG
Doom Builder 2: http://www.doombuilder.com/index.php?p=downloads
Slade 3: http://slade.mancubus.net/index.php?page=downloads
Cinnamon Roll Massacre Aftermath video: https://www.youtube.com/watch?v=2vnKUkQJLD4