When creating new maps for the game, testing them in ecwolf is a pain (it also is a pain in the official wolf3d binary, but I don't really think we need to keep it that way). First, you have to sit through a bunch of loading splashscreens, then you have to start the game, enter the debug mode and warp to the desired level... In short, it takes quite a while to even get to the desired level, and when iterating through multiple versions of a map, you'd rather be able to quickly launch the game, test your changes and exit.
ZDoom handles this with two command line arguments:
-warp. For example, you could start zdoom.exe as
zdoom -warp 02 -skill 4 to immediately start the second map on the Ultra-Violence difficulty, without any splash screens or menus. Suggest implementing these arguments for ECWolf as well, to simlify map testing.