i know, you could punch them to death and i have no idea what could i do with this. And i know, it is short. I want to make one more map after this one, that will continue this one.

As for difficulty, this isn't hard at all since you can easily punch punks and bullies to death if you take them on one-by-one - unless you mean that for whatever reason players decided to restrict themselves to guns.

Regarding the idea of limited weaponry, you haven't set up any measures to control the player's initial load out here. This gets especially easy with something like hammer with death & taxes, which I would imagine could be quite common. To prevent this, you could rename the filename into lv0_1.nc (level's title can stay the same) which would, because of the innate scripting linked to file names, make it so that the player would have no weapons and then at the start of the level you could provide a revolver.

Premise is okay, it looks clean, and design isn't too shabby either. Obviously it's very short - seems more like a demo of a level than an actual custom map :/

This is one of those few times where a follow-up level after this one would have felt approriate IMO. This would work well as a setup level that sets the scene, so to speak, and as a warmup for the player. This is what I did in "Heads On Prices" with the "Silent As A Candle" section.